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真有人问：月球上那个坑为啥命名天津，不叫北京？
source link: https://tech.sina.com.cn/d/s/2019-02-16/doc-ihrfqzka6249257.shtml
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来源：北京日报微信公众号你知道吗，今天，月球上多了一个“基地”！什么基地？我们要去流浪月球了？是的！新的“月球基地”！它的名字叫做——“天河基地”！那我们什么时候出发去月球！且慢！我们暂时还不用去！今天，中国国家航天局与国际天文学联合会联合
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