固定发动机

例句：

1. 1. The new car has a fixed engine that runs quietly.
   这款新车有一个安静运行的固定引擎。
2. 2. The old farmhouse had a fixed engine that could be heard from a distance.
   旧农舍有一个可以远听的固定引擎。
3. 3. The train's fixed engine was the only source of power for the entire village.
   火车的固定引擎是整个村庄唯一的动力来源。