There's a whole vast scholarship on this and two or three of the teaching assistants in this class are real experts on it.

荣誉的学问是很深的,这门课有两三位助教,对这方面很有研究

耶鲁公开课 - 美国内战与重建课程节选

Actually three of our graduates or current students are teaching fellows in this class.

我们有三名毕业生或在读生,是这门课的助教。

哈佛公开课 - 幸福课课程节选