mean annual discharge

• 年平均流量

mean annual discharge的用法和样例：

例句

1. The presence of boundary conditions leads to non-uniformity in the mean unsaturated flow, which in turn causes non-stationarity in the statistics of velocity fields.
   存在边界条件导致非均匀饱和的平均流量，而这反过来又导致非平稳性的统计速度场。