The enumerated files are copied to an intermediate directory.

将枚举的文件复制到中间目录。

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TMPDIR: Temporary work directory to keep the generated intermediate files.

TMPDIR：保存生成的中间文件的临时工作目录。

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Mkdir -p creates the named directory, including any intermediate directories that need to be created; and CD changes to the new directory.

mkdir - p创建指定目录，包括任何需要创建的中间目录；cd命令则切换到新目录。

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