1　引　　言自然科学期刊,特别是学术期刊,对论文的要求比较严格,要求作者在尽可能短的篇幅内,以最明确、最易理解的形式表达他的研究过程与研究结果.但要做到这一点,并非易事.有相当一部分作者忽略了或不熟悉学术论文的写作特性和规范,许多来稿不符合出版要求,需要反复修改方 1 Introduction Natural science journals, especially academic journals, have stringent requirements on the dissertation and require the author to express his research process and results in the clearest and most understandable form in the shortest possible length. However, This point is not easy.A considerable number of authors ignore or are not familiar with the writing characteristics and norms of academic papers, many of the manuscripts do not meet the publication requirements, need to be modified repeatedly