The steam was condensed rapidly by injecting cold water into the cylinder.
由于汽缸中注入了冷水，蒸汽迅速凝结了。
《牛津词典》
2
The final step came when steam was introduced into the cylinder to drive the piston backward as well as forward, thereby increasing the speed of the engine and cutting its fuel consumption.
最后一步是将蒸汽引入气缸，使得活塞前后推动，从而提高了发动机的速度，降低了燃料消耗。
3
Once the cylinder had been filled with steam it was cooled directly by the application of cold water.