This study USES action research as the main research method.

本研究主要采用行动研究法。

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This study USES both empirical and normative research methods.

本论文采用的是经验与规范相结合的研究方法。

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This study USES methodology of literature analysis and questionnaire.

本研究采用的是文献研究法和调查法。

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This study uses one of the rare opportunities to study wild animals in a semi-wild setting.

BBC: Chimpanzee grooming is a 'postcode lottery'

However, a study of similar recent uses of power shows why this campaign is proving to be so difficult.

BBC: Why war effort to oust Gaddafi has few options remaining