we learned that the average number of romantic relationships for people to take positive psychology in 4 years is between zero and one.

我们了解到上积极心理学课的人,在4年里恋爱次数的平均数在0到1之间。

哈佛公开课 - 幸福课课程节选

But that was before taking positive psychology class. That was before taking the class.

但那是在上积极心理学课之前，是在上课之前。

哈佛公开课 - 幸福课课程节选

In one study by James Cutting, Cutting taught an Introduction to Psychology course and before each lecture he'd flash pictures on the screen.

在James，Cutting做的一个研究中，他教一门心理学导论课程,在每节课上课前，他会在屏幕上放一些图片。

耶鲁公开课 - 心理学导论课程节选