当您在应用程序中导航时，就创建了一个活动堆栈，使用手机上的后退按钮就就可从该堆栈中出来。

As you navigate through the application you build a stack of activities that you can then pop out of by using the back button on the phone.

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有些应用程序在创建的时候使用表单输入按钮，而把取消动作当成文本链接。

Some applications use the form input button for the create action, and have the cancel action as a text anchor.

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例如，客户可以编写一个包含某个视图的应用程序，该视图可以在单击按钮时创建一个透视图。

For example, one could write an application containing a view that creates a perspective when a button is clicked.

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