And he was doing quite a few studies with them.

确实他们用它来做了不少的研究。

麻省理工公开课 - 化学原理课程节选

Tell me I think you do a few case studies in this book or this grounded in different communities.

不妨讲讲，我知道你在书里做了些个案研究,或者说是在不同群体中做的。

普林斯顿公开课 - 人性课程节选