他回答说：“我这么做是因为我必须这么做。”

He replies, "I act because I must."

youdao

我必须这么做，要准备好，你知道的。

It has to do with, well, with being ready, you know.

youdao

“事实就是这样，”死神说，“我必须这么做。”

"It is indeed the fact," Death continued, "that I have to do this."

youdao

Well clearly what I probably want to do here is what? Print these same two things.

看看我得到了什么，哦,我必须，当然也得这么做。

麻省理工公开课 - 计算机科学及编程导论课程节选

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