The article focuses on quantity analysis, discussion of using constantquantity instrument to do semimicro chemical analysis experiment.
本文围绕定量分析实验中，利用常量仪器进行半微量化学分析进行探讨。
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In zero pressure gradient flow, this local momentum loss is Minost an additive constantquantity. 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。
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And that implies that since the quantity we want is given by this quantity, which is zero times a constant, the quantity we want is also zero.