And, that's a good thing to know because if you come out with an answer that's somewhere near the diameter of the universe and it's supposed to be the diameter of an atom, then you will know that you probably made a mistake.

这是我们需要知道的,因为当你做一道题得到的答案,是宇宙的直径,而正确答案是原子直径时，你能很快发现你的错误。

麻省理工公开课 - 固态化学导论课程节选

Even if you come home about two or 2:30 in the morning near our apartment you can still see rather large rats dashing across the street; some of them look so bloated they look like sangliers, or wild boar, which you can see occasionally in parts of rural France.

如果你是在凌晨两点或两点半回家,在你家附近,仍会有来回乱窜的特大号老鼠,你偶尔可以在法国的乡下看到,一些老鼠大得像野猪

耶鲁公开课 - 1871年后的法国课程节选