巢状容器这个物件是逻辑上包含零或多个子元件，并且由某个父元件所拥有，但视觉上不一定如此。
A nested container is an object that logically, but not necessarily visually, contains zero or more child components and is owned by some parent component.
巢状容器这个物件是逻辑上包含零或多个子元件，并且由某个父元件所拥有，但视觉上不一定如此。
A nested container is an object that logically, but not necessarily visually, contains zero or more child components and is owned by some parent component.
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