the unsteady flow

• 非恒定流

the unsteady flow的用法和样例：

例句

1. As a qualitative analysis,finite element method gets a more satisfactory result in describing the propagation of the long wave of open channel unconstant flow.
   作为一种定性分析，有限单元法对描述明渠非恒定流长波的传播给出了满意的结果。