但你必须那样做。

But you must do it.

youdao

您并不是必须要这样做，但这是一种很好的做法。

You do not have to do this, but it's good practice.

youdao

您虽然还是可以做更多的事情，但必须使用并发编程才行。

You can still do more stuff, but you have to do it using concurrent programming.

youdao

All right, so I did this not at all purposely, but this can point out for you that you need to make sure that the number of electrons that you have in your molecular orbital does match up with the total number that you have in your atomic orbitals.

我并不是故意这么做的，但这告诉我们必须要保证,分子轨道里的电子数,和原子轨道里的,总电子数能对上。

麻省理工公开课 - 化学原理课程节选

I thought I still have to work for another 30, 40 years. I need to do something else.

我原本想，我还必须工作三四十年。但我需要做点别的事情。

怡人的的汉普斯特德 - SpeakingMax英语口语达人

But in order to do so, you have to use terms like "punishment" and "reward" and "reinforcement" in such a vague way that in the end you're not saying anything scientific.

但如果你要这样去做，你就必须将惩罚，奖励“,强化之类的术语概念模糊化,最终你所作出的解释便毫无科学性。

耶鲁公开课 - 心理学导论课程节选