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携程旅行网: 酒店预订, 机票预订, 旅游度假, 商旅管理
携程旅行网是中国领先的在线旅行服务公司，向超过1400万会员提供集酒店预订、机票预订、度假预订、商旅管理、特惠商户及旅游资讯在内的全方位旅行服务。
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NCBI HomePage
The National Center for Biotechnology Information (NCBI) provides an integrated approach to the use of gene and protein sequence information, the scientific literature (MEDLINE), molecular structures, and related resources, in biomedicine.
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TOMPDA智能手机论坛 智能手机 手机游戏 软件教程 手机/PDA电影 手机评测 手机论坛 - Powered by Discuz!
TOMPDA智能手机论坛 智能手机 PDA 数码论坛 手机评测 软件评测 - Discuz! Board
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Social Annotation: Seamless Integration of Social Bookmarking, Web Highlighter, Sticky-Note & Clipping
Killer features for finding, managing and sharing online information. A powerful personal tool and a rich social platform.
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