The machine had enough forward momentum to be able to fly on its planes.

飞机已有足够的前冲量靠机器维持飞行。

I want to slow down its forward momentum.

我想放慢它前进的势头。

At the same time, your increased forward momentum makes you more stable, allowing you to stand up and surf along the wave.

与此同时，你增加的前进动力会使你更稳定，让你可以站起来沿着波浪冲浪。

Because moving air causes these different air pressures, the airplane's forward momentum is critical for it to fly.

由于移动的空气会产生不同的气压，因此飞机的前进动力对于其飞行至关重要。