上轨道

shàngguǐdào

to stay on track

圆轨道

yuánguǐdào

circular orbit (in astronomy and in astronautics)

轨道舱

guǐdàocāng

orbital module

地球轨道

dìqiúguǐdào

earth orbit

轨道交通

guǐdàojiāotōng

metro

送上轨道

sòngshàngguǐdào

to send into orbit

轨道空间站

guǐdàokōngjiānzhàn

orbiting space station

轻型轨道交通

qīngxíngguǐdàojiāotōng

light rail

载人轨道空间站

zàirénguǐdàokōngjiānzhàn

manned orbiting space station