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关键词是文献检索的主要入口之一，它能直观地反映主题，便于读者检索。其标引质量的高低直接影响到科技文献的有效传播和高效利用，影响着整个信息传播系统的优劣。对其传播效果进行分析，能更好地指导传播实践活动，促进科技期刊的编排质量和学术质量的不断提高。“,”＂Key words＂ is one of the main entrances of literature searching; it can reflect the theme directly and help readers to search the papers they want. Key words are in the basic place in information ecological chain and one of basic elements in system circulation. The quality of key words affects whether the information communication system is good or not. Analyzing the effects can guide communication in the practice and improve the quality of editing work and the academic level of the journals.