coefficient of locomotive requirment

例句：

1. 1.The locomotive was the first to arrive at the station.
   火车头是第一个到达车站的。
2. 2. The engineer had to repair the locomotive before it could start again.
   工程师必须在火车再次启动前修理好火车头。
3. 3. The locomotive was a marvel of engineering and design.
   这列火车头是工程和设计上的奇迹。