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1988年7月1日

1分钟阅读

来自高处的讯息

卫星定位和数据中继进入市场

作者：蒂姆·比尔兹利

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This article was originally published with the title “Messages from on High” in 大众科学 Magazine Vol. 259 No. 1 (July 1988), p. 112
doi:10.1038/scientificamerican0788-112

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