A modern sports glider, with long, slender wings, is the most aerodynamically efficient aircraft, with a lift-to-drag ratio of around 50:1.

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。

youdao

There is little in the way of future predictions, apart from the suggestion that aeroplane wings may soon have bristles, a "fuzziness" that would reduce drag and therefore be more fuel-efficient.

他几乎没有对未来做预言，除了暗示飞机翅膀可能很快就会有短毛，因为这种“羽毛特性”会降低拖力，因而更节约燃料。

youdao

One of the biggest costs of the lack of proper governance is its drag on the efficient working of capital markets, which chokes off opportunities for entrepreneurs and companies to raise capital for legitimate business reasons.

FORBES: Off with their perks!