Major research methods of variations studies in comparative literature include studies of variations in language, in reception and in images.
比较文学变异学的主要研究方法有语言层面的变异研究，接受层面的变异研究和形象层面的变异研究。
The second chapter focuses on Ping Fang's work in literary studies, including the study of foreign literatures and comparative literature.
第二章，着重审视方平的文学研究，包括外国文学和比较文学方面的研究成果。
Multiple fixation strategies have been described in the literature, and there are no comparative clinical studies to suggest improved outcomes with any particular fixation strategy.
文献中报道了多种固定策略，其研究结果表明任一特定的固定策略均可改善治疗的临床效果，但无临床对比研究。
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