This routine can be called as a part of the application's exit handler or clean up routines.

应用程序的退出处理函数或清理例程可以调用这个例程。

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That is to say, assuming the class invariant was satisfied before the routine was called, the routine must ensure that class invariant is again going to be satisfied on exit.

也就是说，假设类不变式在该例程调用前被满足了，那么例程退出时必须再次确保类不变式得到满足。

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Escape key: a computer keyboard key that is used to exit a mode or routine, or cancel some function.

换能键：电脑键盘上用来走出一个模式或例行程序或取消一些功能的键。

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Escape key: a computer keyboard key that is used to exit a mode or routine, or cancel some function.

换能键：电脑键盘上用来走出一个模式或例行程序或取消一些功能的键。

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