这个学期你们有多少门学科的英文怎么写

　　你每学期要完成三个书面作业。

　　You will need to complete three written assignments per semester.

　　最后一学期的时间将全部用于专题研究。

　　The final term will be devoted to project work.

　　这是对一门极为复杂的学科的有益入门教程。

　　It's a useful introduction to an extremely complex subject.

　　此书对我们了解这门学科助益甚少。

　　This book contributes little to our understanding of the subject.

　　我一时还真说不清我们去年赚了多少钱。

　　I don't know offhand how much we made last year.

　　我觉得我今天没干成多少事。

　　I don't feel I've accomplished very much today.