Each method also takes an argument giving the current leading indentation string, which gets an added space for each level of class nesting.

每个方法还有一个给出当前缩进字符串的参数，它使每一级类嵌套都缩进一些空间。

youdao

Each method also takes an argument giving the current leading indentation string, which gets an added space for each level of class nesting.

每个方法还有一个给出当前缩进字符串的参数，它使每一级类嵌套都缩进一些空间。

youdao