In zero pressure gradientflow, this local momentum loss is Minost an additive constant quantity. On the other hand, adverse pressure gradient results in amplification of this momentum loss.
在零压力梯度下,这个局部的动量损失几乎是一个附加的常量,而逆压梯度则会扩大这种动量损失。
2
When there's a smaller gradient, air is often able to flow down from the Arctic.
而当它们之间只有一个较小的气压梯度时,风就能够经常从北极区向南吹。
3
And that told us that the flow is proportional to a negative gradient of a concentration.