His face was a study in concentration.

　　他臉上完全是一副全神貫注的表情。

　　This study represents a major expenditure of time and effort.

　　這項研究意味著(zhù)要耗費大量的時(shí)間和精力。

　　This study is the cornerstone of the whole research programme.

　　此項研究是整個(gè)研究計劃的基礎。

　　The first year provides students with a sound theoretical basis for later study.

　　第一年為學(xué)生以后的學(xué)習奠定堅實(shí)的理論基礎。

　　The content of the course depends on what the students would like to study.

　　課程的內容取決于學(xué)生愿意學(xué)什么。