The top-level class is DisplayObject, which Flex adds to the Stage object, or the universal display list, of Flash Player.

最顶层的类是 DisplayObject，Flex 将它添加到 Flash Player 的 Stage 对象或通用显示列表。

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The first phase, commit, occurs when Flex adds a component to the main display list (hereafter referred to as "stage") using addChild() or one of its variants in the DisplayObject class.

第一个阶段是提交，该阶段在 Flex 使用 addChild() 或它在 DisplayObject 类中的变体之一向主显示列表（此后称为 “阶段”）添加组件时发生。

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