So that way you can have an idea if, oh, I do really understand this but I'm a little bit slow, maybe I need to practice this one type of problem a little bit longer so I can get up to speed so I'm going to be able to get through all this in terms of the exam time.

这样你就可以知道，假设，噢，我真的懂这个，但是我的速度有点慢，或许我需要在练习这个类型的题目上,多花一点时间,这样我就可以提高自己的速度,可以全部做完,在考试规定的时间内。

麻省理工公开课 - 化学原理课程节选

There's one by an English traveler, he entitled it, "A Georgia Planter's Method of Spending Time."

其中有一个是英国游客写的,题目叫,《一位格鲁吉亚种植园主的消磨时间法》

耶鲁公开课 - 美国内战与重建课程节选

Sure enough 11:55 comes, it is the last thing they are doing.

确保到11：55时间足够了，这就是他们做的最后一个题目。

麻省理工公开课 - 固态化学导论课程节选