They had walked in single file down the path.

他们是一前一后走下小径的.

辞典例句

There is a standing order, that I have on file down here.

这里有一份长期的定单, 我存放在档案里.

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The solution is to file down the guide blade by about 1 mm.

解决方案即是把导向叶片锉掉约1毫米.

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File down the woodwork before you paint it.

在油漆木制品之前先把表面打磨平滑.

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