I've asked them to give a brief presentation about the Masters of Applied Positive Psychology at U Penn, the only master degree, well the first master degree in the world-- there are a couple of others now.

我请他们简单介绍一下,宾州大学应用积极心理学硕士课程，唯一的硕士学位，世界上第一个硕士学位-,目前还有其他几个。

哈佛公开课 - 幸福课课程节选