diff --git a/03：类与对象/img/赋值.drawio.svg b/03：类与对象/img/赋值.drawio.svg
index 8bed59e..84e66dc 100644
--- a/03：类与对象/img/赋值.drawio.svg
+++ b/03：类与对象/img/赋值.drawio.svg
@@ -1,455 +1,596 @@
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-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 95px; margin-left: 226px;">
-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: normal; overflow-wrap: normal;">
-                                赋值后
+                    </foreignObject>
+                    <text x="95" y="189" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        2
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g/>
+        <g>
+            <rect x="180" y="70" width="150" height="150" rx="22.5" ry="22.5" fill="#dae8fc" stroke="#6c8ebf" pointer-events="all" style="fill: light-dark(rgb(218, 232, 252), rgb(29, 41, 59)); stroke: light-dark(rgb(108, 142, 191), rgb(92, 121, 163));"/>
+        </g>
+        <g>
+            <rect x="225" y="80" width="60" height="30" fill="none" stroke="none" pointer-events="all"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 95px; margin-left: 226px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    赋值后
+                                </div>
                             </div>
                         </div>
-                    </div>
-                </foreignObject>
-                <text x="255" y="99" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    赋值后
-                </text>
-            </switch>
-        </g>
-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 135px; margin-left: 191px;">
-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: normal; overflow-wrap: normal;">
-                                i
+                    </foreignObject>
+                    <text x="255" y="99" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        赋值后
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <rect x="190" y="120" width="60" height="30" fill="none" stroke="none" pointer-events="all"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 135px; margin-left: 191px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    i
+                                </div>
                             </div>
                         </div>
-                    </div>
-                </foreignObject>
-                <text x="220" y="139" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    i
-                </text>
-            </switch>
-        </g>
-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 185px; margin-left: 191px;">
-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: normal; overflow-wrap: normal;">
-                                j
+                    </foreignObject>
+                    <text x="220" y="139" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        i
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <rect x="190" y="170" width="60" height="30" fill="none" stroke="none" pointer-events="all"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 185px; margin-left: 191px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    j
+                                </div>
                             </div>
                         </div>
-                    </div>
-                </foreignObject>
-                <text x="220" y="189" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    j
-                </text>
-            </switch>
-        </g>
-        <rect x="250" y="120" width="50" height="30" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="none"/>
-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 48px; height: 1px; padding-top: 135px; margin-left: 251px;">
-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: normal; overflow-wrap: normal;">
-                                2
+                    </foreignObject>
+                    <text x="220" y="189" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        j
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <rect x="250" y="120" width="50" height="30" fill="#ffffff" stroke="#000000" pointer-events="all" style="fill: light-dark(#ffffff, var(--ge-dark-color, #121212)); stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 48px; height: 1px; padding-top: 135px; margin-left: 251px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    2
+                                </div>
                             </div>
                         </div>
-                    </div>
-                </foreignObject>
-                <text x="275" y="139" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    2
-                </text>
-            </switch>
-        </g>
-        <rect x="250" y="170" width="50" height="30" fill="rgb(255, 255, 255)" stroke="rgb(0, 0, 0)" pointer-events="none"/>
-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 48px; height: 1px; padding-top: 185px; margin-left: 251px;">
-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: normal; overflow-wrap: normal;">
-                                1
+                    </foreignObject>
+                    <text x="275" y="139" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        2
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <rect x="250" y="170" width="50" height="30" fill="#ffffff" stroke="#000000" pointer-events="all" style="fill: light-dark(#ffffff, var(--ge-dark-color, #121212)); stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 48px; height: 1px; padding-top: 185px; margin-left: 251px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    2
+                                </div>
                             </div>
                         </div>
-                    </div>
-                </foreignObject>
-                <text x="275" y="189" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    1
-                </text>
-            </switch>
-        </g>
-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 15px; margin-left: 511px;">
-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: normal; overflow-wrap: normal;">
-                                引用赋值（对象）o1=o2
+                    </foreignObject>
+                    <text x="275" y="189" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        2
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <rect x="510" y="0" width="140" height="30" fill="none" stroke="none" pointer-events="all"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 138px; height: 1px; padding-top: 15px; margin-left: 511px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    引用赋值（对象）o1=o2
+                                </div>
                             </div>
                         </div>
-                    </div>
-                </foreignObject>
-                <text x="580" y="19" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    引用赋值（对象）o1=o2
-                </text>
-            </switch>
-        </g>
-        <rect x="400" y="60" width="160" height="170" rx="24" ry="24" fill="#fff2cc" stroke="#d6b656" pointer-events="none"/>
-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 75px; margin-left: 451px;">
-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: normal; overflow-wrap: normal;">
-                                赋值前
+                    </foreignObject>
+                    <text x="580" y="19" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        引用赋值（对象）o1=o2
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g/>
+        <g>
+            <rect x="400" y="60" width="160" height="170" rx="24" ry="24" fill="#fff2cc" stroke="#d6b656" pointer-events="all" style="fill: light-dark(rgb(255, 242, 204), rgb(40, 29, 0)); stroke: light-dark(rgb(214, 182, 86), rgb(109, 81, 0));"/>
+        </g>
+        <g>
+            <rect x="450" y="60" width="60" height="30" fill="none" stroke="none" pointer-events="all"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 75px; margin-left: 451px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    赋值前
+                                </div>
                             </div>
                         </div>
-                    </div>
-                </foreignObject>
-                <text x="480" y="79" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    赋值前
-                </text>
-            </switch>
-        </g>
-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 18px; height: 1px; padding-top: 124px; margin-left: 405px;">
-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: normal; overflow-wrap: normal;">
-                                o1
+                    </foreignObject>
+                    <text x="480" y="79" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        赋值前
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <rect x="404" y="109" width="20" height="30" fill="none" stroke="none" pointer-events="all"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 18px; height: 1px; padding-top: 124px; margin-left: 405px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    o1
+                                </div>
                             </div>
                         </div>
-                    </div>
-                </foreignObject>
-                <text x="414" y="128" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    o1
-                </text>
-            </switch>
-        </g>
-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 18px; height: 1px; padding-top: 186px; margin-left: 405px;">
-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: normal; overflow-wrap: normal;">
-                                o2
+                    </foreignObject>
+                    <text x="414" y="128" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        o1
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <rect x="404" y="171" width="20" height="30" fill="none" stroke="none" pointer-events="all"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 18px; height: 1px; padding-top: 186px; margin-left: 405px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    o2
+                                </div>
                             </div>
                         </div>
-                    </div>
-                </foreignObject>
-                <text x="414" y="190" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    o2
-                </text>
-            </switch>
-        </g>
-        <path d="M 460 186 L 460 160 L 550 160 L 550 186" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="none"/>
-        <path d="M 460 186 L 460 212 L 550 212 L 550 186" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="none"/>
-        <path d="M 460 186 L 550 186" fill="none" stroke="rgb(0, 0, 0)" stroke-miterlimit="10" pointer-events="none"/>
-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
-                    <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 173px; margin-left: 505px;">
-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: nowrap;">
-                                o2:Circle
+                    </foreignObject>
+                    <text x="414" y="190" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        o2
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
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+            <path d="M 460 186 L 460 212 L 550 212 L 550 186" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="none" style="stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
+            <path d="M 460 186 L 550 186" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="none" style="stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 173px; margin-left: 505px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: nowrap; ">
+                                    o2:Circle
+                                </div>
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-                    </div>
-                </foreignObject>
-                <text x="505" y="177" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
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-                                radius=9
+                    </foreignObject>
+                    <text x="505" y="177" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        o2:Circle
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <rect x="460" y="186" width="90" height="26" fill="none" stroke="none" pointer-events="all"/>
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+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe flex-start; width: 80px; height: 1px; padding-top: 193px; margin-left: 466px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: left; max-height: 22px; overflow: hidden; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    radius=9
+                                </div>
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-                                o1:Circle
+                    </foreignObject>
+                    <text x="466" y="205" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px">
+                        radius=9
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <path d="M 424 186 L 453.63 186" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke" style="stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
+            <path d="M 458.88 186 L 451.88 189.5 L 453.63 186 L 451.88 182.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all" style="fill: light-dark(rgb(0, 0, 0), rgb(255, 255, 255)); stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
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+        <g>
+            <path d="M 460 124 L 460 98 L 550 98 L 550 124" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all" style="stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
+            <path d="M 460 124 L 460 150 L 550 150 L 550 124" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="none" style="stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
+            <path d="M 460 124 L 550 124" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="none" style="stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 111px; margin-left: 505px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: nowrap; ">
+                                    o1:Circle
+                                </div>
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-                </foreignObject>
-                <text x="505" y="115" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    o1:Circle
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-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
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-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: normal; overflow-wrap: normal;">
-                                radius=5
+                    </foreignObject>
+                    <text x="505" y="115" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        o1:Circle
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <rect x="460" y="124" width="90" height="26" fill="none" stroke="none" pointer-events="all"/>
+        </g>
+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe flex-start; justify-content: unsafe flex-start; width: 80px; height: 1px; padding-top: 131px; margin-left: 466px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: left; max-height: 22px; overflow: hidden; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    radius=5
+                                </div>
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-                <text x="466" y="143" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px">
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-        <g transform="translate(-0.5 -0.5)">
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-                                赋值后
+                    </foreignObject>
+                    <text x="466" y="143" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px">
+                        radius=5
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <path d="M 424 124 L 453.63 124" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="stroke" style="stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
+            <path d="M 458.88 124 L 451.88 127.5 L 453.63 124 L 451.88 120.5 Z" fill="#000000" stroke="#000000" stroke-miterlimit="10" pointer-events="all" style="fill: light-dark(rgb(0, 0, 0), rgb(255, 255, 255)); stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
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+        <g/>
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+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 58px; height: 1px; padding-top: 75px; margin-left: 651px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    赋值后
+                                </div>
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-                    </div>
-                </foreignObject>
-                <text x="680" y="79" fill="rgb(0, 0, 0)" font-family="Helvetica" font-size="12px" text-anchor="middle">
-                    赋值后
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-        <g transform="translate(-0.5 -0.5)">
-            <switch>
-                <foreignObject pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility" style="overflow: visible; text-align: left;">
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-                        <div data-drawio-colors="color: rgb(0, 0, 0); " style="box-sizing: border-box; font-size: 0px; text-align: center;">
-                            <div style="display: inline-block; font-size: 12px; font-family: Helvetica; color: rgb(0, 0, 0); line-height: 1.2; pointer-events: none; white-space: normal; overflow-wrap: normal;">
-                                o1
+                    </foreignObject>
+                    <text x="680" y="79" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        赋值后
+                    </text>
+                </switch>
+            </g>
+        </g>
+        <g>
+            <rect x="604" y="109" width="20" height="30" fill="none" stroke="none" pointer-events="all"/>
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+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 18px; height: 1px; padding-top: 124px; margin-left: 605px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    o1
+                                </div>
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-            <switch>
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-                                o2
+                    </foreignObject>
+                    <text x="614" y="128" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        o1
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+        </g>
+        <g>
+            <rect x="604" y="171" width="20" height="30" fill="none" stroke="none" pointer-events="all"/>
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+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 18px; height: 1px; padding-top: 186px; margin-left: 605px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
+                                    o2
+                                </div>
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-                                o2:Circle
+                    </foreignObject>
+                    <text x="614" y="190" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        o2
+                    </text>
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+        </g>
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+            <path d="M 660 186 L 660 160 L 750 160 L 750 186" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="all" style="stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
+            <path d="M 660 186 L 660 212 L 750 212 L 750 186" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="none" style="stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
+            <path d="M 660 186 L 750 186" fill="none" stroke="#000000" stroke-miterlimit="10" pointer-events="none" style="stroke: light-dark(rgb(0, 0, 0), rgb(255, 255, 255));"/>
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+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
+                        <div xmlns="http://www.w3.org/1999/xhtml" style="display: flex; align-items: unsafe center; justify-content: unsafe center; width: 1px; height: 1px; padding-top: 173px; margin-left: 705px;">
+                            <div style="box-sizing: border-box; font-size: 0; text-align: center; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: nowrap; ">
+                                    o2:Circle
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-                                radius=9
+                    </foreignObject>
+                    <text x="705" y="177" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px" text-anchor="middle">
+                        o2:Circle
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+                <switch>
+                    <foreignObject style="overflow: visible; text-align: left;" pointer-events="none" width="100%" height="100%" requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility">
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+        <g>
+            <g transform="translate(-0.5 -0.5)">
+                <switch>
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+                            <div style="box-sizing: border-box; font-size: 0; text-align: left; max-height: 22px; overflow: hidden; color: #000000; ">
+                                <div style="display: inline-block; font-size: 12px; font-family: &quot;Helvetica&quot;; color: light-dark(#000000, #ffffff); line-height: 1.2; pointer-events: all; white-space: normal; word-wrap: normal; ">
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+                    <text x="666" y="143" fill="light-dark(#000000, #ffffff)" font-family="&quot;Helvetica&quot;" font-size="12px">
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+        </g>
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         <g requiredFeatures="http://www.w3.org/TR/SVG11/feature#Extensibility"/>
-        <a transform="translate(0,-5)" xlink:href="https://www.diagrams.net/doc/faq/svg-export-text-problems" target="_blank">
+        <a transform="translate(0,-5)" xlink:href="https://www.drawio.com/doc/faq/svg-export-text-problems" target="_blank">
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