Introductory remarks: Mainly give an account of the summary of study present situation, the theory bases and the main research methods of this paper.
导论主要讲述了研究现状综述、本文的理论依据与主要研究方法。
Chemistry 11 is an introductory laboratory course concerned with the description, classification and theory of matter.
高二化学是一门化学基础介绍性的实验课程,涉及到部分化学现象的描述、分类、理论实践等方面内容。
In the paper, first of all, in the introductory part of the proposition of the times, the practice of confusion, three areas inspired the theory of research problems;
论文中,首先,在引言部分根据时代的命题、实践的困惑、理论的启迪三方面提出研究的问题;
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