这个功能对于长文件名尤其有意义；可以只输入前几个字母并让 shell 补齐文件名。

This functionality is particularly useful with long filenames -- you can key in the first few letters and let the shell complete the filename.

youdao

今天我在游乐园丢了钱包。其实也不是那么糟糕，如果四个星期前没有丢过钱包，而且刚补齐了所有的东西的话。

Today, I lost my wallet at an amusement park. It wouldn't be so bad except I lost it 4 weeks ago and just got everything replaced. FML.

youdao