pilot engine

例句：

1. 1. The newaircraft has a pilot engine that can take off from the runway.
   这款新型飞机有一个可以起飞的飞行员引擎。
2. 2.The old car had a pilot engine that was difficult to start.
   那辆旧车有一个难以启动的飞行员引擎。
3. 3. The train's pilot engine is responsible for guiding the train through the tunnel.
   火车的飞行员引擎负责引导火车穿过隧道。