The BDS is mainly comprised of three segments: space segment, ground segment and user segment.
北斗系统由空间段、地面段和用户段三部分组成。
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。
Space segment includes LEO satellites, which provide ground users and gateways with communication links;
空间段由低轨卫星构成，为地面用户间、地面用户与信关站之间提供通信链路；
Space segment includes LEO satellites, which provide ground users and gateways with communication links;
空间段由低轨卫星构成，为地面用户间、地面用户与信关站之间提供通信链路；
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