对于收益决策类型的题目，一个有效的图表就是以时间为序，画出收入与成本序表。

A useful chart for declining profitability type of problems is to draw revenues and costs over time.

youdao

先仔细检查一下题目要求，万一只需要建立，而不用求值的话，就不要浪费时间去求值了。

First of all, check just in case the problem says set up but do not evaluate. Then, don't waste your time evaluating it.

youdao

这本书的弱点在于它只花了一点点时间来回答题目自身所提出的问题：为什么现在流行尼布尔？

The book’s weakness is that it spends little time answering the question its title poses. Why Niebuhr now?

youdao

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