这个感叹号是换码符，允许您从交互输入模式或批处理模式发出操作系统命令。

The exclamation mark is an escape character that lets you issue operating system commands from either interactive input mode or batch mode.

youdao

每当我度假回家时，心中都会发出这样的感叹：“哇，谢天谢地，我到家了。”

Every time I return from vacation, I think, "Wow, thank God that I am home."

youdao

我发出了悲哀的感叹。

I sent a sad sigh.

youdao