这类技巧可以用来建立索引，或将目录树状结构内容的索引反转。

This type of technique could be used to create indexes or reverse indexes of the contents of a directory tree.

youdao

这类技巧可以用来建立索引，或将目录树状结构内容的索引反转。

This type of technique could be used to create indexes or reverse indexes of the contents of a directory tree.

youdao