劳伦斯·斯坦是费城坦普尔大学的一位心理学教授。

Laurence Steinberg is a psychology professor at Temple University in Philadelphia.

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一位心理学教授回了一封很长的信，并邀请他过去谈谈。

One of the psychology professors E-mailed back a lengthy response, with an invitation to come in and chat.

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这个问题的答案实际上是几个小判断共同编译而成的，来自于圣博娜迪诺加州州立大学的一位心理学教授凯利。凯贝尔这样解释。

Thee answer is actually a compilation of several smaller judgments, explains Kelly Campbell, a psychology professor at California State University, San Bernardino.

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And another person from Harvard, Philip Stone one of the parents of positive psychology was Philip Stone, who passed away two years ago, yesterday.

还有一位哈佛的教授，积极心理学的另一位父辈，两年前的昨天去世了。

哈佛公开课 - 幸福课课程节选