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国际公认的六大检索系统为 :①ＳＣＩ(ＳｃｉｅｎｃｅＣｉｔａｔｉｏｎＩｎｄｅｘ) ,美国《科学引文索引》的核心期刊 ,ＳＣＩ是位于美国费城的一个非官方科学信息研究所 (ＩｎｓｔｉｔｕｔｅｏｆＳｃｉｅｎｔｉｆｉｃＩｎｆｏｒｍａｔｉｏｎ)所收集和统计的关于科学论文发表情
The six internationally recognized search systems are: (1) SCI (ScienceCitationIndex), the core journal of the United States “Science Citation Index”, SCI is a collection of scientific papers published by the Institute of Scientific Information in Philadelphia, United States