Part I is the introduction, which describes the background and meaning of the research and introduces researching status.
第一部分引言,阐述了选题背景和意义,并介绍了国内外对产业竞争力以及光电子产业的研究现状。
参考来源 - 武汉光电子产业竞争力研究·2,447,543篇论文数据，部分数据来源于NoteExpress
In this article the fabrication of these materials forming mechanism of optical nonlinearity in the materials and the researching status are discussed.
本文介绍了材料的构成、光学非线性产生的机理和研究现状，并讨论了其应用前景。
The present paper discusses current researching status of pyrrhotite bioleaching in detail in terms of its mechanisms, kinetics and intensifying measures.
本文从浸出机理、动力学和强化措施等方面阐述了生物浸出磁黄铁矿的研究现状。
The first part starts with the research background of the problem, make clear the domestic and international researching status, points out the aim and sense.
第一部分从课题的研究背景入手，分析了国内外研究状况，明确了本课题的研究目的和方法。
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