“这不是开玩笑，赛赛曼先生。”小姐严肃地回答。

"It is no joke, Mr. Sesemann," replied the lady seriously.

youdao

我希望你们绝对安静，因为这不是开玩笑。

I want you to be extremely quiet, because this is no joke.

youdao

他还说这不是开玩笑，飞机“正在下坠”。

He also said this was not a hoax, and that the plane "was going down."

youdao

That seems like a bad joke,but if the body theory is right, it's not a joke at all.

又是一个冷笑话，但如果肉体主义者是对的，这就不是开玩笑了。

耶鲁公开课 - 死亡课程节选

There are no tricks.

这不是开玩笑。

麻省理工公开课 - 固态化学导论课程节选