运行yùnxíng周而复始地运转(多指星球、车船等){(of planets) revolve in cycle; (of ships and vehicles) move year round; be in motion; be in operation}: 人造卫星的～轨道{orbit of a man-made satellite}|列车～示意图{sketch map of train routes}|缩短列车的～时间。{shorten the time for a train to get from one place to another}