Why don't we go ahead and take a five-minute break?

为什么我们不开始休息5分钟呢？

哈佛公开课 - 计算机科学课程节选

We have about twenty-five copies, so don't take one if you don't need it.

有25份，已经有了的同学不要再拿了。

耶鲁公开课 - 文学理论导论课程节选

Why don't we go ahead and take our five-minute break.

为什么我们不休息5分钟。

哈佛公开课 - 计算机科学课程节选

Well, a cross-sectional study would mean that you'd get a random group of the population and measure them in 1970 and then take another random group five years later and measure them, but it wouldn't be the same people necessarily, it would be different groups of people.

那么,横断面研究就是,1970年你在人群中随意选择一组人,并记录下相关数据,然后,五年后再随意选择一组人记录数据,但这不需要是同一组人,通常是不同的人

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选