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.

youdao

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.

youdao