It's the most physically complicated component of an airplane.

它是飞机上最复杂的组成部分
Nearly 200 feet long, it bears the weight of the entire aircraft

长度近两百英尺能承受整架飞机的重量
and is shaped precisely to fit within a hundredth of an inch.

设计精确在百分之一英寸内
The curvature of the wing is what gives it its lift.

机翼的曲率能使飞机升空
Air rushes faster over the top, creating a vacuum,

气流速度快到极致产生真空
which sucks the wing upward and in turn the entire fuselage.

对机翼产生向上的升力再带动整个机身
This is important because an airplane wants to be nose-up.

这很重要因为飞机要机头上扬
It creates positive Gs, that sensation you get

会产生正重力你能感觉到
when you're forced to the back of your seat.

被迫坐在座位上
Negative Gs, on the other hand,

但是负重力
are an entirely different matter.

就是另一回事了
When the nose of a plane begins pitching downward,

当机头开始俯仰向下