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。
2
My earliest memories are of pointing to the sky, having detected the far-off drone of a pistonengine.
我能回忆起的最早的事情就是指着天空，耳边传来远处的活塞引擎的轰鸣声。
3
The plane uses a pistonengine rather than a large-scale turbine jets, allowing it to travel unaffected through the ash, unlike large commercial jets.