In comparison of English and Chinese, their study of parallel structure is feeble and difficult.
在英汉语对比研究中，并列结构的研究既是个薄弱环节，又是个难点。
It is mainly used as comparison test in the study process of material and structure.
主要作为材料或结构研究的测试对比测试。
It is mainly used as comparison test in the study process of material and structure.
主要作为材料或结构研究的测试对比测试。
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