那将是一件伟大的事情，但是你怎么能做到呢？

That would be a great thing, but how can you contrive it?

youdao

我们提出了一开始看起来很有吸引力的理论，但是接下来，你要如何解释以前也发生过这种情况呢？

We have what at first seems like a pretty attractive theory, but then, how do you explain the fact that this has happened before?

youdao

哦，但是我们还需要第三把椅子——你认为罗特麦耶小姐会不会一起来呢？

Oh, but we need a third chair—or do you think that Miss Rottenmeier won't come, perhaps?

youdao

And actually, a question that might come up, I just explained, the sodium channel, you might say, well, how do potassium channels work then, because I can understand how you can filter something big out, but how do you filter out something small.

实际上，可能大家会问一个问题，我刚解释过，钠离子通道，你可以说，好吧，那么钾离子通道该如何起作用呢，因为我可以理解你是如何把大东西过滤掉的，但是你如何把小东西过滤掉呢？

麻省理工公开课 - 化学原理课程节选

You want to talk about it systematically, but how can you talk about anything systematically if you don't know what it is?

人们总希望系统化地谈一件事，但是你一点都不了解它,怎么能系统化地谈它呢？

耶鲁公开课 - 文学理论导论课程节选

But how do you kind of decide this is really what I feel like I wanna do with?

但是你是怎么决定,这才是我想要做的事情呢？

普林斯顿公开课 - 人性课程节选