And why is the current president, Barack Obama,sometimes compared to the sixteenth president, Abraham Lincoln?

VOA: special.2009.07.24

So this is why you sometimes had Jews getting in trouble with local groups and had violence with Jews in different places.

所以犹太人常常与当地人发生冲突,在各地都发生涉及犹太人的暴力事件。

耶鲁公开课 - 新约课程节选

And this is actually, in general, why it's sometimes difficult to teach or to tell stories because we constantly overestimate how much other people know.

概而论之，这就是为什么有时候我们很难能讲一个故事,因为我们总是认为别人什么都猜到了。

耶鲁公开课 - 心理学导论课程节选

Why is history and memory sometimes a deep family matter, to Southerners?

为什么对于南方人来说,历史,有时是和记忆紧密联系在一起的

耶鲁公开课 - 美国内战与重建课程节选

If souls can't split,it can only follow one half of the brain, and that's why we'll get somebody that's got one half, sometimes the other half,but never both halves.

如果灵魂不能分割，只跟随一半大脑，才能有只有其中一个得到半个大脑的人存活，而没有两人同时存活的状况。

耶鲁公开课 - 死亡课程节选

So, that can be a little bit confusing for us to think about, and when it's a very good question you might, in fact, say well, maybe there's not zero probability here, maybe it's just this teeny, teeny, tiny number, and in fact, sometimes an electron can get through, it's just very low probability so that's why we never really see it.

这想起来有点令人困惑，你们可能会说也许，这里的概率并不是严格的为零，而是非常非常小，所以有时电子就可以穿过去，这是个,很好的想法。

麻省理工公开课 - 化学原理课程节选

Here, too, gets a little ugly and this is why I tend not to like this construct, at least in C, but sometimes it's necessary or it's the simplest way to achieve this goal.

这里也有点难看的，这也是为什么我,不太喜欢这个结构，至少在C语言中，但是有时它是必须的,或者它是达到目标最简单的方法。

哈佛公开课 - 计算机科学课程节选