His face was a study in concentration.
他脸上完全是一副全神贯注的表情。
Physiology is the study of how living things work.
This study represents a major expenditure of time and effort.
这项研究意味着要耗费大量的时间和精力。
This study is the cornerstone of the whole research programme.
此项研究是整个研究计划的基础。
The report studies the organization of labour within the company.
这个报告研究了公司内部的人力分配问题。
