We were walking in single file to the lake.

我们排成单行走向湖边。

They made their way in single file along the cliff path.

他们一个接着一个沿悬崖小径前进。

Run a project or a single file.

运行一个项目或一个文件；

Replace, add, or remove a single file

替换，添加，后者移除一个单独的文件

There is a single file per module.

每个模块一个文件。