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

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。

youdao

It lets some of the built up humidity escape and allows an exchange of stale inside air for air from the fresh outdoors.

这样做可以使潮湿的、废旧的空气逸散，同时保持室内空气清新。

youdao

This lets him feel like he's totally immersed in the game he's playing -- a complete escape from reality.

这让他能够完全沉浸在游戏中，完全脱离现实世界。

youdao

Rather, the scene is from The Crate Escape: Seamus Unleashed, a soon to be released iPhone app which lets you save Seamus (now deceased) from his unfortunate circumstance.

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