You mustn t talk to each other in class.

不许在课堂上互相说话。

youdao

When installing the mixer, you should miunimize diameter at shaft gland towards quaking magnitude. the mixer mustn ' s be counterclocked, otherwise it will drop.

安装搅拌器要求轴封处之径向跳动量调到最小程度，搅拌器不可反转，以免脱落。

youdao

Frost says at the time that he's publishing A Boy's Will, to a friend: You mustn't take me too seriously if I now proceed to brag a bit about my exploits as a poet.

他在发表第一本书时对一个朋友说：,不要对我太认真,如果我现在吹嘘自己已是一位诗人。

耶鲁公开课 - 现代诗歌课程节选

You shouldn't be able to hear very much either, and it mustn't have been too delightful to breathe out of the thing, although your nose is free, but it's covered by a nose piece.

而且也听不见什么了,同时,戴着头盔呼吸也不是很顺畅,虽然鼻子并不受束缚,但是上面有一块小薄片覆盖着

耶鲁公开课 - 古希腊历史简介课程节选

"You mustn't start fixing up the closets and taking Aunt Lucy to the doctor because you're the only one at home, " she says.

FORBES: Magazine Article

"You mustn't do that kind of thing, " his instructor said.

BBC: Robert Smith-Barry: The man who taught the world to fly

Not playing can get you down, there are going to be good and bad moments, but you mustn't sulk - you've got to make sure you're ready if needed.

BBC: Keeping the chin up