But they don't actually stand on the podium grinning.

但站在领奖台上，他们没有微笑。

耶鲁公开课 - 心理学导论课程节选

And it turns out that there's a correlation, a reliable relationship between how happy somebody is now and back thirty years ago in their yearbook photo-- what sort of smile they're giving.

事实证明有相关性，可靠的关系,现在很开心的关系，30年后也是,在他们的年鉴照片里-,他们给出的微笑类型。

耶鲁公开课 - 心理学导论课程节选

They're smiling. You're smiling.

他们在微笑，我们在微笑。

耶鲁公开课 - 心理学导论课程节选