She changed her area of study from English to science after she took a biology course that she liked.

VOA: special.2010.03.14

I think it's reasonable for people who are considering the study of a particular subject in a college course to ask why they should.

大家都想将这一科目,作为一门学问做深入的研习,所以这个问题显得很为必要

耶鲁公开课 - 古希腊历史简介课程节选

Throughout all of this, they are subjected to a course of rigorous study and physical training that will lead them to adopt prominent positions in the military and other branches of public service.

这一进程，需要他们遵循,严格的学习及体能的训练,以便他们顺利接掌重要的军职,及其它公共服务事项。

耶鲁公开课 - 政治哲学导论课程节选