The diff helps you create a patch file, which is the preferred way of sending code submissions to many open source projects.

diff可以帮助我们创建补丁文件(patch file)，后者是我们向很多开放源码软件项目发送代码提交时通常使用的方法。

youdao

Thats how I remember that downloading is the other computer sending you the file.

下载过程就是由对方的计算机向你发送文件，我就是这样来记住它的。

youdao