There are groups of people who have studied the impact of Trans fats on health for a number of years.

有些人已对反式脂肪,对健康的影响进行了数年的研究

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

I studied German for about 6 months in Berlin.

我在柏林对德国进行了6个月的研究。

再没时间也要挤出来 - SpeakingMax英语口语达人

The second one--the second study illustrates this issue even more clearly.

第二个研究,更加清晰的对该问题进行了阐述

耶鲁公开课 - 心理学导论课程节选

And they studied them.

他们对这些双胞胎进行了研究。

哈佛公开课 - 幸福课课程节选

This is a research by one of the leading researchers, one of the first researches in the area of positive emotions, Alice Isen And she showed, time and again, how feeling good is good for us and good for others, and it works the other way as well.

一位重要的研究者，积极情绪领域的首批研究者之一，进行了这个研究，Alice，Isen。,她反复证明，感觉好如何对我们和他人都有益，反之亦然。

哈佛公开课 - 幸福课课程节选