默认情况下，即是当前所在目录(一个由“。”指定的路径名)。

By default, this is the current directory (the one designated by ". "pathname).

youdao

默认情况下，即是当前所在目录(一个由“。”指定的路径名)。

By default, this is the current directory (the one designated by ". "pathname).

youdao