它的意思是我们创建一个新的列表，然后用Rules列表里的元素经过变换之后填充到新列表。

It means we are creating a new list and populating it with transformed elements of the Rules list.

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创建一个对各个参数运行对应的变换函数的函数。

Creates a function that runs each argument through a corresponding transform function.

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