list控件的结构与for- each循环类似：它会遍历一个集合，对于集合中的每个项目，它都会进行渲染。

The list control construct is similar to a for-each loop: it iterates over a collection and for each item in the collection it renders its body.

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对于有3个标签，选项卡控制卡控件包含在一个动态的小组，有三个国家，每个标签之一。

For a TAB control with 3 tabs, the TAB control is contained in a dynamic panel which has three states, one for each TAB.

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对于有3个标签，选项卡控制卡控件包含在一个动态的小组，有三个国家，每个标签之一。

For a TAB control with 3 tabs, the TAB control is contained in a dynamic panel which has three states, one for each TAB.

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