My mother always told me, if you study hard, the answers should be right under your nose or easily seen.

VOA: special.2009.09.13

Let me read to you an excerpt from a study that was run by two MIT professors.

我来读一段麻省理工两位教授的研究。

哈佛公开课 - 幸福课课程节选

Let me share with you one study to illustrate what I mean.

下面我用一项研究来说明。

哈佛公开课 - 幸福课课程节选