For long hours he flew, listening only to the sound of his engine.
在经过长时间的飞行，他只能听到发动机的声音。
Engine trouble grounded his plane for three hours.
引擎故障使他的飞机三个小时无法起飞。
It took the engineer 5 hours to attach the engine to the train.
把这发动机装在火车上花了工程师五小时。
It took the engineer 5 hours to attach the engine to the train.
把这发动机装在火车上花了工程师五小时。
应用推荐