The stack velocity calculated on the floating datum depends on the velocity of medium underlying the low velocity layer and is independent of topography and low velocity layer.
在此浮动基准面上求取的叠加速度仅取决于低速带底板下伏介质的速度，而与地形、低速带无关。
A medium-thick shelterbelt can reduce wind velocity by more than 10 percent to a distance of 20 times the tree height on the leeward side and three times the height to the windward.
中等厚度的防风林在背风侧可在20倍于树高的距离而在迎风侧则在3倍于树高的距离上减小风速10%以上。
If you know what m is, the mass of an object, the radius, and you know the values for C1 or C2 of that medium in which you move it, then you can calculate what the terminal velocity is.
如果你知道M是什么，是物体的质量，半径，知道C1值或者，媒介的C2值，然后你，就能算出终极速度。
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