residual flux density

例句：

1. 1.The residual flux density of the gas is very low, which means it is difficult to detect.
   气体的残余流量密度非常低，这意味着很难检测到。
2. 2.The residual flux density measurement is crucial for understanding the behavior of the fluid.
   残余流量密度测量对于理解流体的行为至关重要。
3. 3. The residual flux density can be used to estimate the flow rate and pressure drop in a pipe.
   残余流量密度可以用来估计管道中的流速和压力降。