可加装风机调速装置以调节洁净空气速率。
A blower speed control device can be incorporated to allow adjustment of the clean air velocity.
飞机上的机翼制造升力超过阻力，但具体取决于机翼的设计和当时经过的空气流动速率。
The aerofoil of a wing creates more lift than drag, but exactly how much depends on its design and the speed of the air passing over it.
但是最有说服力的证据显示：该物体既不是飞碟，也不是探空气球，而是一个代号为“莫古尔计划”的高飞行速率的、极机密的军事气球。
Yet the best evidence suggests that it was neither a flying saucer nor a weather balloon, but instead a high-altitude, top-secret military balloon dubbed Project Mogul.
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