The event handler for components normally executes in the invoke application phase.
组件的事件处理程序通常都是在调用程序阶段执行的。
For example, let's say the user clicks a button that is bound to an action method, which gets invoked during the invoke application phase (refer back to Figure 1 for details).
例如，假定用户单击了绑定到某个操作方法的按钮，那么就会在调用应用程序阶段调用这个方法(有关的细节，请参见上面的图1)。
The immediate attribute can also be set to true for command buttons whose action methods should be called during the Apply Request Values phase rather than waiting until the Invoke Application phase.
也可针对一些命令按钮将immediate属性设为true，这些命令按钮的操作方法应该在ApplyRequestValues阶段调用而不是等到Invoke Application 阶段调用。
The immediate attribute can also be set to true for command buttons whose action methods should be called during the Apply Request Values phase rather than waiting until the Invoke Application phase.
也可针对一些命令按钮将immediate属性设为true，这些命令按钮的操作方法应该在ApplyRequestValues阶段调用而不是等到Invoke Application 阶段调用。
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