They do not know why da Vinci painted it, or how it ended up in the collection of French ruler Francis the First.

VOA: special.2010.06.23

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

And maybe it was something else. But they withdrew for some reason And how and why they took up the worship of Yahweh or the cult of Yahweh isn't really clear but it seems to have been what marked them as distinct from other Canaanites.

也许是其他原因，但是他们因某一原因而收回,而他们怎样又为何开始了耶和华崇拜,或者说耶和华宗教并不清楚，但似乎,正是这点让他们区别于其他的迦南人。

耶鲁公开课 - 旧约导论课程节选

You remember in the first lecture I said there's a difference between the history of criticism and theory of literature, one difference being that the history of criticism has a great deal to do with literary evaluation: that is to say, why do we care about literature and how can we find means of saying that it's good or not good?

你们还记得吗，第一节课我说过,文学评论历史和文学理论有一个重大区别，那就是文学评论的历史,很大程度上与文学评估有关：,意思就是我们为什么要关心文学,还有我们怎么能说一部作品是好还是坏？

耶鲁公开课 - 文学理论导论课程节选

Why? How could neurons be all or nothing when sensation is very graded?

为什么,既然感觉是渐增的,那神经元又怎会是服从全或无法则的呢

耶鲁公开课 - 心理学导论课程节选