Let me show you a quick excerpt from a video of one of my favorite psychologists, actually the commedian, Seinfeld.

我来放一段我最喜爱的心理学家之一的录影，其实是喜剧演员宋飞。

哈佛公开课 - 幸福课课程节选

Just a quick check and this is not for the camera, how many of you have seen Bertrand competition before?

我们迅速了解一下,这不是为了录影,你们谁之前学过伯川德竞争

耶鲁公开课 - 博弈论课程节选

We will watch a lot of excerpts throughout the semester.

我们这个学期会看很多录影。

哈佛公开课 - 幸福课课程节选