At the end of the semester or at the end of the lecture, if you enjoyed it, by all means tell me that you enjoyed it, that you had fun.

在这学期结束后或者在这个讲座结束后，如果你们喜欢它，务必告诉我你们喜欢，你们获得了乐趣。

哈佛公开课 - 幸福课课程节选