locomotive waiting for repair

例句：

1. 1. The locomotive was the main source of power for the train.
   这台机车是火车的主要动力来源。
2. 2. The engineer had to repair the locomotive before it could resume service.
   工程师必须在火车恢复服务前修理好机车。
3. 3.The locomotive was a marvel of engineering and design.
   这台机车是工程和设计上的奇迹。