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ACS is one of the world’s largest scientific societies and the premier home of chemistry profes……
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Red Hat is the world’s leading provider of enterprise open source solutions, including high-per……
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UNICEF works in more than 190 countries and territories to reach the most disadvantaged childre……
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ThinkPHP框架 - 是由上海顶想公司开发维护的MVC结构的开源PHP框架，遵循Apache2开源协议发布，是为了敏捷WEB应用开发和简化企业应用开发而诞生的。
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MathType是一款专业的数学公式编辑器，兼容Office word,excel等700多种程序，用于编辑数学试卷、书籍、报刊、论文、幻灯演示等文档轻松输入各种复杂的数学公式和符号。
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Join Coursera for free and learn online. Build skills with courses from top universities like Y……
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Ubuntu is the modern, open source operating system on Linux for the enterprise server, desktop,……
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