non-stationary flow

• 不稳定流

non-stationary flow的用法和样例：

例句

1. It describes unsteady flow toward a discharging well in an extensive aquifer.
   它描述位于广阔含水层中的抽水井的非稳定流。
2. Difference model for calculating formation pressure of oil wells at multireservoirsingle phase unstable radial flow condition is established.
   本文建立了多油层径向单相不稳定流条件下油井地层压力计算的差分模型。