high-speed steam engine

例句：

1. 1.This high-speed steam engine can reduce the time of transportation by 50%.
   这种高速蒸汽机可以节省运输时间50%。
2. 2. The high-speed steam engine is an important part of the railway system.
   高速蒸汽机是铁路系统的重要组成部分。
3. 3.The high-speed steam engine has greatly improved the efficiency of the coal-fired power plant.
   高速蒸汽机大大提高了燃煤电厂的效率。