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德国施普林格(Springer-Verlag)是世界上著名的科技出版集团，通过SpringerLink系统提供其学术期刊及电子图书的在线服务，该数据库包括了各类期刊、丛书、图书、参考工具书以……

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Enter the world of Formula 1. Your go-to source for the latest F1 news, video highlights, GP re……

Introducing iPhone 12 Pro and iPhone 12 with 5G, MagSafe accessories, and HomePod mini.

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