Mars and Earth have orbits that change with time.火星和地球的运行轨道随时间而变化。

The planet is probably in orbit around a small star.这颗行星可能是绕着一颗小恒星运行。

They put a satellite into orbit.他们将一颗卫星送入轨道。

In the late 1970s Laos fell within the orbit of Vietnam and the Soviet Union.20世纪70年代后期, 老挝被纳入越南和苏联的势力范围。

This asteroid takes 238 years to orbit the sun.这颗小行星绕太阳运行一周需要238年。

The craft will orbit for five days before returning to earth.这个飞行器在返回地球前将绕轨道运行5天。