他们发现，冰川向前流动的速度比以前曾经观察到的流速更快。

They found it was marching forwards at a greater pace than a glacier had ever been observed to flow before.

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因为他不是很善于游泳，况且河水流动的速度简直像要把颈骨折断似的。

He wasn't a strong swimmer, and the river was moving at breakneck speed.

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通过模拟计算得出了发火巷道内烟气流动的速度场、温度场详细分布情况。

The distribution of velocity and temperature of the smoke flow in the fire tunnel was calculated by the simulation.

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