如果你请他，他一定非常乐意参加。

If you invite him, he'll be only too glad to attend.

youdao

如果你请他，他就会来。

If you ask him, he will come.

youdao

如果你有疑虑，可以向其他人请教，或请他们解释他们如何或者在哪里学到了这些知识。

When in doubt, feel free to ask people to cite their sources, or to explain how/where they learned something.

youdao

So, click one if you think that he's going to have 1 the longest wavelength.

如果你认为他投出去的球,波长最长请点击。

麻省理工公开课 - 化学原理课程节选