非实体数学敲门等入已经有几个世纪了。

For many centuries, nonphysical mathematics had been knocking at the door waiting to be let in.

youdao

当识别出预定义的尝试序列(称为敲门序列)时，可以执行打开端口等操作，让外部的用户能够进来。

Whenever a predefined and specific sequence of attempts is recognized (called a knock sequence), you can execute actions like opening a port so the outsider can get in.

youdao

这是否意味着你只是躺在那儿静等生活来敲门？

Does that mean you just lay back and let life happen?

youdao