by changing the shape so that there's more surface area

通过改变机翼形状以使其
on top of the wing than there is on the bottom.

上表面的面积大于下表面
You change the relative velocities that air can move over the wing,

这也就改变了空气流过机翼的相对速度
over the top of the wing versus over the bottom of the wing,

流过机翼上部的空气速度和流过下部的速度不同
you create a flow separation or a disturbance here

这样就产生了流动分离或者是扰动
where the pressure drops relative to the pressure in the ambient air.

因此上表面所受压强相比大气压有所降低
The pressure drops because of this turbulent air flow pattern.

压强降低是因为湍流的作用
If there's less pressure here than there is down here,

如果上面这里的压强比下面的压强低
you get a force acting up,

你就得到一个向上的力
pressure is force per area.

压强就是单位面积上的压力
If there's a difference in pressures from top to bottom,

如果上下表面的压强不同
more pressure on the bottom than there is on the top,

下表面所受压强比上表面大