Only a tiny segment of the Qin wall remains, which was a reinforced earth barrier unlike the imposing stone structure built by the Ming Dynasty some twelve centuries later.
秦朝长城现仅存一小段，秦朝长城是用土坯加固的，不像12个世纪后的明朝修建的长城是石头结构的。
A typical orbit of lunar probe includes earth parking orbit segment, earth-moon transfer orbit segment, lunar satellite orbit segment and moon-landing orbit segment.
典型的月球探测器飞行轨道包括地球停泊轨道段、地月转移轨道段、月球卫星轨道段和着月轨道段。
This paper describes the understanding on earth observation satellite ground segment mission control system.
阐述了对地观测卫星地面管理控制系统的认知和理解。
The MEO satellites are used in the GNSS space segment and in future will still be the mainstay in this segment possibly with the addition of the HEO (High-altitude Earth Orbit) satellites.
全球导航卫星系统(GNSS)空间段采用MEO轨道卫星，未来将仍然以MEO为主，可能有HEO轨道卫星加入运行。
The MEO satellites are used in the GNSS space segment and in future will still be the mainstay in this segment possibly with the addition of the HEO (High-altitude Earth Orbit) satellites.
全球导航卫星系统(GNSS)空间段采用MEO轨道卫星，未来将仍然以MEO为主，可能有HEO轨道卫星加入运行。
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