I'm going to talk about how to prevent this problem first, then tell you a few things you can do when you run into it again in the future as well.

首先我要谈谈如果预防这类的问题，然后也告诉你们一些自己力所能及的事情，倘若以后再遇到这类的状况时。

youdao

well then!how much a day do you earn, my friend?

啊，朋友，那么你一天赚多少钱呢？

youdao

Well, then, how do you know there is one?

唔，那么，你怎么知道有一个呢？

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

And then you look at well how do you mount any sort of military action - after all the RAF are engaged in military action, probably not almost as we speak, in the no-fly zone at the moment.

BBC: News | BREAKFAST WITH FROST | Conservative Leader, Iain Duncan Smith MP