Some sleep in class or in the library.

一些同学在课堂上睡觉。

youdao

I don't think he should sleep in class.

我认为他不应该在上课的时候睡觉。

youdao

Don't sleep in class!

不要在课堂上睡觉。

youdao

Now I have been teaching this for over seven years because I heard these words over 10 years ago in a yoga class that totally woke me up from a deep sleep of ignorance of what really is.

FORBES: There's Nothing Wrong With You. Really.