It's because over the last two years since I last taught it, I've done a lot work in the area of silence.

因为上次课程结束后到现在的两年，我做了大量关于安静的研究。

哈佛公开课 - 幸福课课程节选

And they actually did a really large study on children who were raised in gay or lesbian families,

他们确实对同性恋家庭里长大的孩子做了大量研究，

给我结婚的自由 - SpeakingMax英语口语达人

Roger Ibbotson, who is a colleague of Bob Shiller's and mine at the School of Management, has done a fair amount of work, studying the relative importance of these sources of returns.

罗格·伊博森是,我和希勒在管理学院的同事,他在对回报率来源的研究上,做了大量的工作

耶鲁公开课 - 金融市场课程节选