In aerodynamic terms, lift is a function of weight, thrust and drag (air resistance).

在空气动力学上，升力是重量，推力和阻力(空气阻力)的相关的函数。

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The configuration also provides acoustic shielding and, at low speed, increases aircraft lift without a thrust or drag penalty.

该构造还提供声屏蔽，并且在低速下，增加飞机升力的同时没有推力或阻力损失。

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The results shows that the vertical and thrust forces of the wings, which balances the weight and the body drag, are mainly contributed by the drag of the wings.

结果表明：蝴蝶主要用“阻力原理”作拍动飞行，即平衡身体重量的举力和克服身体阻力的推力均主要由翅膀的阻力提供。

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With no thrust and plenty of drag, we rapidly slowed to 100 knots, then 80 knots.

FORBES: Magazine Article

By changing the angle of its wings and its body, the moth was able to create a delicate balance between the thrust pushing it forwards, the drag - or air resistance - pushing against it, and the lift keeping it in the air.

BBC: Footage reveals how insects use their bodies to hover