在大部分研究案例中，一些社区成员至少获得一些利益，但单靠地方控制并不能保证更好的森林管理。
In most of the examples studied, at least some benefit had accrued to some community members, but local control was not in itself a guarantee of better forest management.
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.
本文运用文献分析、案例分析、因素分析等方法对美国专业硕士学位教育的质量控制进行研究。
Via the methods of literature reviews, case study and factor and force analysis, the paper is trying to study the quality control of professional master degree in the United States.
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