If you kick the ball hard enough for the airflow over the surface to become turbulent, then the drag force remains small and the ball will really fly.

如果你踢球的力量足够大，使得球表面的气流形成湍流，则阻力会很小，你很可能踢成高射炮。

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The physical properties, as expressed in momentum and force, and energy and work, of turbulent flow are explained in detail.

关于不可压缩紊流的物理性质在动量和力及能量和功方面加以详细的解释。

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Thesis shows that the insulator surface pollution process has matter with Brownian motion, the air drag force, turbulent diffusion, gravity.

论文研究表明，绝缘子表面积污过程与布朗运动、气流曳力、湍流扩散、重力自沉降有关。

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Mr Gargan, who is also a previous assistant chief constable of the Thames Valley force, said it had been a "turbulent time" but he hoped to repay the confidence of the PCC and the panel through "hard work and common sense".

BBC: Nick Gargan confirmed as Avon and Somerset Chief Constable