This change redistributes the balance of lifting forces along the entire wingspan. 这样的变化将会改变升力在整个翼面上的分布状况。
An airfoil produces a lifting force that acts at right angles to the airstream and a dragging force that acts in the same direction as the airstream. 翼型产生升力的方向与气流成直角，阻力方向与气流方向相同。
