Oh, he is a naughty boy, that Cupid; you must never have anything to do with him.

啊，那个丘比特是个顽皮的孩子；你决不能和他有任何瓜葛。

youdao

You must never do this.

这件事你做不得。

《新英汉大辞典》

Equally, you must never read a speech.

同样，你决不能照稿读。

youdao

She often said: "You must never so much as think if you like it or not, if it is bearable or not.

VOA: special.2009.07.26

And so the big issue is -- this is what you must never do, but this is what you got to do if your phalanx is broken.

所以现在的大问题是,这也许是你在战场上永远不能做的事,但你在方阵被打散时不得不这么干

耶鲁公开课 - 古希腊历史简介课程节选

Ok I've never even seen it, so that's good -- you must be better travelled than I.

有一部分，我从来没见过这是什么,很好，你们旅游的比我多哈。

麻省理工公开课 - 化学原理课程节选

You are too, but to really be like Steve, you must never stop innovating.

FORBES: RIP Steve Jobs: We're Glad You Knew Us

What goes without saying is that you must never admit to actually wearing barbecue as a fragrance.

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You must never underestimate the power of a small a detail or the importance of a bit of information.

CNN: Student log: Danielle Zayas