中地球轨道是全球定位系统（美国）、格洛纳斯系统（俄罗斯）和伽利略定位系统（欧洲）等导航卫星运行的轨道。另外，俄罗斯正在关闭国境内全球定位系统的地面工作站。
It might be interesting to know that MEO is the orbit of GPS, Glonass and Galileo satellites. It is also interesting that Russia is shutting down their GPS stations.
这是全球四大导航网络之一，其他三个是美国的全球定位系统、俄罗斯的格洛纳斯和欧盟的伽利略。
It's one of four global (全球的) navigation networks, including the United States' GPS, Russia's GLONASS and the European Union's Galileo.
欧洲官员称这种说法无事实根据，并对美国所谓的伽利略(人造卫星)会对全球定位系统在商业上构成挑战的说法持反对意见。
European officials say this is unfounded and counter that US opposition is due to the commercial challenge Galileo would present to GPS.
欧洲官员称这种说法无事实根据，并对美国所谓的伽利略(人造卫星)会对全球定位系统在商业上构成挑战的说法持反对意见。
European officials say this is unfounded and counter that US opposition is due to the commercial challenge Galileo would present to GPS.
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