When a function is entered, it knows how to locate its parameters and where to store its return values.

当输入一个函数，它知道如何定位参数和在哪里存储其返回值。

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These are the methods that a calling function and a called function agree on how parameters and return values should be passed between them, and how the stack is used by the function itself.

这是调用方与被调用方约定好如何互相传递参数和返回值，以及函数自己如何使用栈。

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