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ntsc.ac.cn
中国科学院国家授时中心是我国唯一、专门、全面从事时间频率基础研究和应用研究的科研机构，承担着我国国家标准时间（北京时间）的产生、保持和发播任务，建设和运行着的长短波授时系统是我国的第一批国家重大科技基础设施，建成了国内唯一的天地一体星地综合卫星导航授时试验平台，为我国的国家时间频率体系、卫星导航系统的建设和发展做出了重要贡献。国家授时中心总部位于陕西省西安市临潼区，在西安航天产业基地、渭南蒲城设有分部，另有授时发播台、授时监测站、测定轨站分布在全国。主要开展量子频标、时间保持、守时理论与方法、高精度时间传递与精密测定轨研究室、时间频率测量与控制、时间用户系统与终端、导航与通信等研究工作。
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jianshu.com
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lodashjs.com
lodash 是一个一致性、模块化、高性能的 javascript 实用工具库。
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码农教程旨在为码农们提供免费的it编程入门教程和编程学习平台，本码农网涵盖php、java、mysql、html、css、javascript、jquery等流行的编程入门教程。
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tool.lu
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google.com
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weibo.com
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zhihu.com
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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github.com
github is where over 83 million developers shape the future of software, together. contribute to the open source community, manage your git repositories, review code like a pro, track bugs and features, power your ci/cd and devops workflows, and secure code before you commit it.
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beijing-time.org
北京时间现在几点几分几秒？北京时间网告诉你！为您提供现在北京时间校对,农历查询,现在中国标准时间,当前北京时间校准对时等服务。
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matools.com
码工具,matools是程序员的代码在线工具箱：代码对比、格式化、压缩、加密解密、时间戳、二维码、在线api、crontab、正则表达式,还有js/h5/css3特效、技术好文、编程书籍、it资讯等。
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白云一键重装系统是一款傻瓜式的系统重装工具，支持在线一键重装系统xp/win7/win8/win10系统，简单快速重装电脑系统，人人都能学会系统重装，白云一键系统重装软件轻松解决电脑怎么重装系统的困扰！白云最好用一键系统重装软件让人人都能给台式机/笔记本电脑重装系统的软件!
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