如果发动机完成一个工作循环，只需要两个行程，就称为两冲程循环发动机，或者简称两冲程发动机。
If it needs only two strokes to complete a cycle, it is called a two-stroke cycle engine or, for short, a two-cycle engine.
在2冲程发动机，向上中风是压缩行程。
On a 2-stroke engine, the upward stroke is the compression stroke.
用飞行翼的上下行程，身体向上移动，但随后的冲程可以对抗这种力量。
With the down stroke of a wing during flight, the body moves up, but the subsequent upstroke can counter that force.
应用推荐