几分钟后，警察对这位先生说他并没有停车，他只是减了一点速。
After several minutes, the cop explained to the gentleman that he didn't stop, he just slowed down a little.
本文对带折流板式填料塔的流体力学性能进行了探讨，介绍了实验情况，提出了压降和泛点气速的计算式。
This paper discusses fluid mechanics performance of packed tower with baffle, describes cases of experiment and presents computational equation for pressure drop drop and flooding velocity.
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