case study
noun
1
- a process or record of research in which detailed consideration is given to the development of a particular person, group, or situation over a period of time个案研究; 个案史。
2
- a particular instance of something used or analysed in order to illustrate a thesis or principle（供研究的）个案：
airline deregulation provides a case study of the effects of the internal market.
解除对航空业的管制为研究国内市场效应提供了案例。