Many people said the problem with general levels of happiness or unhappiness rather, the cause is people have too high expectations.

很多人说,一般的快乐或不快乐水平，是由于人们有过高的期望。

哈佛公开课 - 幸福课课程节选

And we'll see innumerable error messages today and onward as with you working at home ends on the problem sets 'cause this is the way you learn.

我们将会看到数不清的错误信息,当你在家里做习题集的时候,这也是学习的一种方式。

哈佛公开课 - 计算机科学课程节选