词汇	t'ien hsi
释义	t'ien hsi 天溪
随便看	satellite operation center satellite operation control center satellite operation program Satellite Operations Center Satellite Operations Centre satellite optical communication satellite optical communication network satellite optical link satellite optical network Satellite Optical Surveillance Station satellite optical surveillance system satellite orbi satellite orbit satellite orbital satellite orbital altitude satellite orbital lifetime Satellite orbital maneuver satellite orbital parameter satellite orbital separation satellite orbital track satellite orbit control Satellite Orbit Control Program satellite orbit data satellite orbit density satellite orbit determination