气体每经过一次间隙和随后的较大空腔，气流就受到一次节流和扩容作用，由于旋涡损失了能量，气体压力不断下降，比容及流速均增大。
After each gas gap and then a larger cavity, a flow by reducing expenditure on the role and expansion, loss of energy due to the vortex, the gas pressure drop in both volume and velocity increase.
搅拌白用不厌；在保持空气流通的过程中，“轻轻”这一词也出现了不止一次。
Whiskings went on to the point of foaming or voluminousness, and the word "gently" featured often, keeping the airiness in.
结果表明：一次风率对煤粉气流的着火影响较大，而对出口处烟气温度、氧量以及飞灰含碳量影响较小。
The results illustrate that primary air ratio has a major effect on pulverized coal ignition and minor effects on gas temperature, oxygen concentration and unburned carbon at furnace exit.
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