single expansion steam locomotive

例句：

1. 1.The single-cylinder locomotive was the most efficient way to transport goods in the early days of railways.
   在铁路初期，单缸机车是运输货物最高效的方式。
2. 2.The single-section locomotive was a marvel of engineering, capable of moving large loads over long distances.
   单节式机车是工程奇迹，能够将重物运送到遥远的距离。
3. 3. The single-cylinder locomotive was replaced by more powerful models, but its legacy lives on in the hearts of many engineers.
   单缸机车被更强大的模型所取代，但其遗产在许多工程师的心中仍然活着。