Studies may be controlled by focusing on a few comparable cases, such as studies of the museum-visiting habits of people in European nations or of the management of tourism in East Asia.
通过选取少量的可比案例，可以对研究施加控制，如对欧洲人参观博物馆习惯的研究，或对东亚旅游管理的研究。
Studies may be controlled by focusing on a few comparable cases, such as studies of the museum-visiting habits of people in European nations or of the management of tourism in East Asia.
通过选取少量的可比案例，可以对研究施加控制，如对欧洲人参观博物馆习惯的研究，或对东亚旅游管理的研究。
应用推荐