Database Introduction：
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Beijing Wanwu Keledge Tech.
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The Nature Portfolio is a collection of interdisciplinary research and review journals dedicated to understanding, exploring, and sharing science since 1869.
New Oriental Multimedia Learning Library is a "one-stop" comprehensive learning platform launched by New Oriental.
The National Science and Technology Library (NSTL) has introduced over 30 specialized foreign academic society current journal databases with strong professional relevance but low domestic availabi
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The Oxford English Dictionary Online offers users the most complete, up-to-date, and extensive dictionary from Oxford.
Oxford Journals Collection: a unique package that provides access to 395 high-quality journals in Medicine, Life Sciences, Humanities, Social Sciences, Mathematics and Physical Sciences, and Law.
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PNAS: Proceedings of the National Academy of Sciences of the United States of America（P-ISSN 0027-8424; E-ISSN 1091-6490）《The Proceedings of the National Academy of Sciences was founded in 1914 and
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The Natural Science Citation Index (SCI), is a multi-disciplinary comprehensive database focusing on the field of natural sciences.
Science has been at the center of important scientific discovery since its founding in 1880—with seed money from Thomas Alva Edison.
