Contains the thread and method call stack frames.

包含线程和方法调用堆栈框架。

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After this, you define several constants for your stack frames.

之后，为堆栈框架定义几个常量。

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If the thread is suspended, its stack frames are shown as child elements.

如果暂挂一个线程，则其堆栈帧显示为子元素。

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