Faculty here have three major professional activities.

这里的老师们有三个主要的专业活动。

麻省理工公开课 - 固态化学导论课程节选

My major? Basically I study American literature... in English, studying literature from 1865 until now.

我的专业？我主要学习从1865年到现在的美国文学，以英语授课。

和英文专业的朋友 - SpeakingMax英语口语达人

So in fact, there are professional magicians who make it their business to debunk people who claim to genuinely be in contact with the dead and the like.

而事实上,有些专业的魔术师,主要揭露那些声称,能和死人沟通的人的秘密

耶鲁公开课 - 死亡课程节选

But my train primarily is in western psychology.

但我的专业主要是在西方心理学上。

哈佛公开课 - 幸福课课程节选