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为规范数据库重要检索数据项，便于计算机处理和保证数据准确检索与统计，本刊从１９９９年第２期开始，在每篇论文摘要后加入了中图分类号，为文章的分类统计创造条件。由于刚试行，难免有不准确处，敬请广大作者、读者、专家指正。为方便作者撰写论文时准确地列出中图分类号，本刊将陆续摘录《中国图书馆分类法（第四版）》中与本刊论文有关的章节，本期首批摘录Ｏ６５分析化学和Ｏ６９应用化学两节
In order to standardize the important data retrieval database, to facilitate computer processing and to ensure the accurate data retrieval and statistics, we published in the second period of 1999, after each dissertation, we added the CLC to create the conditions for the disaggregation and statistics of the dissertation. As just trial, it is inevitable that there is an inaccurate Department, please the majority of authors, readers, experts correct. In order to facilitate the authors to write the papers accurately listed in the CLC, we will continue to extract the “China Library Taxonomy (Fourth Edition)” and articles related to this chapter, the first batch of the current O65 analytical chemistry and O69 Applied Chemistry two sections