Assistant Secretary Posner said the State Department expects to issue,by year's end, a new list of countries of particular concern on religious freedom, which would be subject to possible U.S.sanctions.

VOA: standard.2009.10.26

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

In particular, electromagnetism is a very abstract subject.

尤其是，电磁学是很抽象的学科。

麻省理工公开课 - 媒体、教育、市场课程节选