I basically gave them free ray at the beginning, so they work in small groups, and travel from site to site.

在最初，我给了他们充分的自由，孩子们组成学习小组，在各地游览。

麻省理工公开课 - 媒体、教育、市场课程节选

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

So one example would be a firm that they both earn, sorry, they both own, and another example would be two of you working as a study group on my homework assignment.

也就是说这两家公司互相赚钱,我说错了,是交叉控股,另外一个例子是两名同学,为了做作业组成了一个学习小组

耶鲁公开课 - 博弈论课程节选