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夜观北斗，便晓东南。自古以来，北斗七星就被赋予了司南功能，用以指方向、辨四季、定时刻。大国重器，璀璨之星。北斗三号全球卫星导航系统正式开通，数颗人造北斗卫星从地面升向太空，担起了服务全球的重任。湘军集

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