Proper use of this markup will allow CakePHP to cache the static parts of the view or layout, while making sure that the dynamic portions of the page are retrieved for every request.
正确地使用此标记将让cakephp缓存视图或布局的静态部分，同时确保对于每个请求都检索页面的动态部分。
When the page is posted and the view state is loaded, the dynamic control does not yet exist; therefore, the extra information in view state does not correspond to the right control.
当张贴网页和载入检视状态时，动态控制项还不存在，因此，检视状态中的额外资讯不会对应到正确的控制项。
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