Path represents the current directory.
path表示当前路径。
The path may be incorrect if you are assuming an incorrect current directory.
如果采用了不正确的当前目录，则路径可能不正确。
Any file you want to run must either be in the current directory or on the search path.
想运行的任意文件都必须是是在当前目录或收索路径里的文件。
If a path is not specified, the file is created in the current directory.
如果未指定路径，则将在当前目录中创建该文件。
If a path is not specified, the file is created in the current directory.
如果未指定路径，则将在当前目录中创建该文件。
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