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北斗真相：你早已用上了北斗，自己都不知道！
source link: http://tech.sina.com.cn/d/2018-04-10/doc-ifyvtmxe8115299.shtml
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来源：科学大院微信公众号虽然已经是2018年了，但说起“北斗系统”，很多人的印象可能还停留在2008年——汶川地震救灾时，是北斗一代设备发出了来自震区的第一条消息。带着这样的印象，不少人在后台向我们提问：总的说来，北斗导航有三项基本功能：定
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