这一个小小的改变可以增进全车大约百分之三的空气动力效率。
The small change may provide an overall aero efficiency gain of around three percent.
现代的飞机设计做得很好，但立足于燃料效率来看，飞机是否能设计得更符合空气动力学——降低阻力还是增加动力？
The modern airplane design works well, but from a fuel efficiency standpoint, could planes be designed more aerodynamically — to lower drag and increase lift?
现代运动用滑翔机的机翼长而细薄，拥有最佳的空气动力学效率，其升阻比达到50：1。
A modern sports glider, with long, slender wings, is the most aerodynamically efficient aircraft, with a lift-to-drag ratio of around 50:1.
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