说明：  GNSS系统——GNSS是Global Navigation Satellite System的缩写。很长时间以来，它有两个译名：全球卫星导航系统和全球导航卫星系统。
(The GNSS system GNSS Global Navigation Satellite System is the abbreviation of. It is a long time, it has two names: global satellite navigation systems and global navigation satellite system.)