If I put some tension on my body, tension on my suit, I can make it fly. And as you see the fall rate is much much slower because of the bigger surface.
假如我用我的身体给翼服增大张力， 我就可以飞行了。显而易见， 翼服飞行的下坠速度要明显得慢 就是因为翼服增大了与空气得接触面积。