There have been relatively few high-quality studies, and this meta-analysis is a welcome addition to the literature.
相对来说高质量的研究较少，该荟萃分析是文献方面很好的补充。
In this analysis, we found that the quality of evidence was very low due to small sample sizes and a paucity of paediatric literature.
本次分析所发现的证据品质极低，因为样本数少而且儿科文献的数量也很欠缺。
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.
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。
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