He later asked her to study a group of chimpanzees living by a lake in Tanzania.

VOA: special.2009.11.18

It could have been a law firm; it could have been working in the study group on a homework assignment.

可能是一家律师事务所,也可能是一起做作业的学习小组

耶鲁公开课 - 博弈论课程节选

You might think there's no point working in a study group at all.

你会觉得没有必要组成学习小组了

耶鲁公开课 - 博弈论课程节选

We did a little study once in our group testing the following hypothesis.

我们小组曾做了个研究,想要检验下述假说

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

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