As a boy,Carl said he knew if it was time to go to school by the sound of a train.

VOA: special.2009.11.01

I was going to say when you first start doing this, even people who have been doing it for a long time still go off on ten-minute daydreams before realizing that their minds were wondering.

我本想说第一次尝试时，但即便是修行多年的人,也会走神十分钟之久,方才意识到自己刚做了白日梦。

普林斯顿公开课 - 人性课程节选

This way of teaching did not perhaps quite so much for a variety of reasons permeate public school literature teaching, but it was simply, as a result of Understanding Poetry, the way to go. It took time.

尽管这种教学方法可能并没有大范围被应用于,公立学校的文学专业，但是它的确符合教育的发展趋向，这也还得归功于《诗歌鉴赏》，它确实需要更多时间。

耶鲁公开课 - 文学理论导论课程节选

If there was a time to go too fast it was probably last time, because it turns out this is something that's covered well in the textbook, so it's covered in chapter six of the textbook.

如果真有哪次讲得太快,可能就是上次,因为这些内容,已经在课本上写得很清楚了,就在课本的第六章

耶鲁公开课 - 博弈论课程节选

So how would we go about solving this problem if I told you not only was there a maximum weight, but there was a maximum volume. Well, we want to go back and attack it exactly the way we attacked it the first time, which was write some mathematical formulas.

有些时候两个都重要,所以如果我告诉你这里不仅有,最大重量还有最大容量，我们应该怎么解决这个问题呢？,好了，我们想回过来然后,和第一次一样看看这个问题。

麻省理工公开课 - 计算机科学及编程导论课程节选