Now that the binding mechanism is clearer, it is very important for you to fully understand the importance and the usage of shadow trees in an RCC context.
现在绑定机制已经清楚了，非常重要的一点是要完全理解影像树在RCC上下文中的重要性和使用方法。
The contents of this element are automatically copied into the shadow tree of each instance of the element for which it is defined at binding time.
该元素的内容被自动复制到绑定时定义的每个元素实例的影像树中。
SVGBindBegin corresponds to the initial binding phase, when the custom element has been parsed but the shadow tree has not yet been built and rendered.
SVGBindBegin 对应绑定的起始阶段，即定制元素已经被解析但还没有建立和呈现为影像树的时候。
SVGBindBegin corresponds to the initial binding phase, when the custom element has been parsed but the shadow tree has not yet been built and rendered.
SVGBindBegin 对应绑定的起始阶段，即定制元素已经被解析但还没有建立和呈现为影像树的时候。
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