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Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.

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知乎,中文互联网高质量的问答社区和创作者聚集的原创内容平台,于 2011 年 1 月正式上线,以「让人们更好的分享知识、经验和见解,找到自己的解答」为品牌使命。知乎凭借认真、专业、友善的社区氛围、独特的产品机制以及结构化和易获得的优质内容,聚集了中文互联网科技、商业、影视、时尚、文化等领域最具创造力的人群,已成为综合性、全品类、在诸多领域具有关键影响力的知识分享社区和创作者聚集的原创内容平台,建立起了以社区驱动的内容变现商业模式。

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Quora - Un lieu pour partager le savoir et mieux comprendre le monde.

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Just a moment...

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Access 130+ million publications and connect with 20+ million researchers. Join for free and gain visibility by uploading your research.

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中国知网知识发现网络平台—面向海内外读者提供中国学术文献、外文文献、学位论文、报纸、会议、年鉴、工具书等各类资源统一检索、统一导航、在线阅读和下载服务。涵盖基础科学、文史哲、工程科技、社会科学、农业、经济与管理科学、医药卫生、信息科技等十大领域。

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Internet Archive is a non-profit digital library offering free universal access to books, movies & music, as well as 624 billion archived web pages.

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豆丁网是面向全球的中文社会化阅读分享平台,拥有商业,教育,研究报告,行业资料,学术论文,认证考试,星座,心理学等数亿实用文档和书刊杂志。

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Toutiao.com is ranked number 166 in the world and links to network IP address 123.58.9.80.

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Attention Required! | Cloudflare.

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Wikimedia is a global movement whose mission is to bring free educational content to the world.

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360doc个人图书馆是免费的知识管理与分享平台,注册后即可拥有自己的个人图书馆,一键保存你在微信、各网站看到的好文章,传承分享你的阅读创作历程,支持电脑、iPad和手机多屏同步阅读和管理。

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Paris - Avis d'utilisateurs et recommandations sur les meilleurs restaurants, magasins, divertissements, services et plus encore sur Yelp

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道客巴巴(doc88.com)是一个在线文档分享平台。你可以上传学术论文,研究报告,行业标准,课后答案,教学课件,工作总结,作文等电子文档,可以自由交换文档,还可以分享最新的行业资讯。

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Learn how to do anything with wikiHow, the world's most popular how-to website. Easy, well-researched, and trustworthy instructions for everything you want to know.

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First published in 1869, Nature is the world’s leading multidisciplinary science journal. Nature publishes the finest peer-reviewed research that drives ground-breaking discovery, and is read by thought-leaders and decision-makers around the world.

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The world’s largest and most trusted free online thesaurus. For over 20 years, Thesaurus.com has been helping millions of people improve their mastery of the English language and find the precise word with over 3 million synonyms and antonyms.

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The dictionary by Merriam-Webster is America's most trusted online dictionary for English word definitions, meanings, and pronunciation. #wordsmatter

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Explore the fact-checked online encyclopedia from Encyclopaedia Britannica with hundreds of thousands of objective articles, biographies, videos, and images from experts.

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Wiktionary.