effort可數(shù)嗎?

　　You should put more effort into your work.

　　你應(yīng)該更加努力地工作。

　　This study represents a major expenditure of time and effort.

　　這項研究意味著要耗費大量的時間和精力。

　　The work was done with the minimum amount of effort.

　　做這項工作沒費什么勁。

　　He made a concentrated effort to finish the work on time.

　　他全力以赴以按時完成這項工作。

　　The project has demanded considerable investment of time and effort.

　　該項目已讓我們投入了相當多的時間和精力。