piston steam engine

基本解释

The core of a steam engine is a cylinder that is sealed at one end and has a moving piston at the other.
蒸汽机的核心是汽缸。它一端密封，另一端有个可以移动的活塞。
The cylinder of a steam engine is closed by plates at Both ends, with provision for the piston rod, which is rigidly attached to the piston, to pass through one of the end cover plates.
蒸汽机的汽缸两端都用盖封住，使得与活塞刚性连接的活塞杆穿过盖的一端。
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.
最后步骤启动，这时蒸汽被导入汽缸从而驱使活塞像向前一样的向后，从而提高引擎的速度切断燃料的耗费。