不过，我们工作时间的长度也有极限。

But there is also a limit to how long we can work.

youdao

甚至法力最强的安慰剂效应也是有极限的。

There are limits to even the strongest placebo effect.

youdao

万物都有极限——铁矿石不可能打造成黄金。

Everything has its limit - iron ore cannot be educated into gold.

youdao

But he continued to say "it is possible; there is no human limitation on that; " we can run the mile in under 4 minutes."

但他还是说“有可能;,在这件事上人类没有极限;,我们能在四分钟之内跑完一英里“

哈佛公开课 - 幸福课课程节选

That you have had your limit.

你可能有你的极限。

That's all课堂 - SpeakingMax英语口语达人

Well, what do we know about extremes of chemical reactivity?

好吧，我们对化学反应的极限有那些了解呢？

麻省理工公开课 - 固态化学导论课程节选