But I also have a weakness for the less common mental disorders that I think tell us something really interesting about mental life.

但我对那些不太常见的心理障碍,也并不是非常了解,不过我倒认为这些不常见的心理障碍,却向我们展示了心理活动有意思的一面

耶鲁公开课 - 心理学导论课程节选

It's a very common class of algorithms, and it's very useful one to have.

这是非常常见的一类的算法，并且也非常的实用。

麻省理工公开课 - 计算机科学及编程导论课程节选