而突出煤样的瓦斯渗透速度增加率则随着瓦斯压力的增大而减小，最终趋近于一恒定值附近。

The increasing rate of the gas seepage velocity of outburst coal samples was decreasing with the increase of gas pressure and reaches to a constant value at last.

土壤的渗透速度影响其吸水的快慢。

The percolation rate of the soil affects how quickly it can absorb water.

上式的平均渗透速度为针对垂直于流动方向的断面的速度，而通过土的流动是发生在土内部相互连接的孔隙间。

The average velocity v calculated from above equation is for the cross-section area normal to the direction of flow.

的杨梅栲胶进行鞣革对比试验，结果表明：渗透速度与栲胶的单宁含量不成正比关系。

The result shows that the penetration rate into pelt isn't direct proportion to tannin content.