运行: move; be in motion; run; working; machine run; operation; corotation; propulsion (影片) 短语和例子在轨道上运行 move in orbit; 列车运行时, 请勿打开车门。 don't open the door while the train is in motion
运行周期: cycel of operationcycle lengthcycle of operationoperation cycleoperational cycle timeperformance period
