It is also a reminder about how arguments and parameters work: when you call a function, the arguments are assigned to the parameters.

也能提醒实际参数和形式参数的使用过程：调用一个函数的时候，把实际参数的值赋给了形式参数。

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An interface is like a contract between a function and a caller. The caller agrees to provide certain parameters and the function agrees to do certain work.

一个交互界面，就像是函数和调用者的一个中间人。调用者提供特定的参数，函数完成特定的任务。

youdao