题文
与过去的定位系统相比，北斗定位系统更精准更强大．
the positioning systems in the past， Beidou positioning system is more accurate and powerful．
与过去的定位系统相比，北斗定位系统更精准更强大．
the positioning systems in the past， Beidou positioning system is more accurate and powerful．
试题篮
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