【摘要】 以几个检索实例 ,说明在中文数据库检索系统中检索化学化工文献时 ,为保证查准率和查全率 ,应注意分子式检索的使用更多还原

【Abstract】 During searching chemistry and chemical engineering literature in Chinese database retrieval system, in order to sure the searching accuracy and thoroughness, attention should be paid to the use of molecular formula index. This situation is illustrated by several examples in this paper.更多还原