basic flow的用法和样例：
例句
- Base flow separation method and isotope technique were adopted to study the cyclic relationship between river water and groundwater.
通过基流分割计算和同位素技术的应用，研究了区内地下水和地表水之间的水循环规律及地下水对黄河的贡献。 - The ray theory of geometric optics was applied to visually investigate the propagation of quasi stationary waves in time mean basic flow and interpret the zonal nonhomogeneity.
应用几何光学中的射线理论，直观地讨论了准定常波在时间平均基流中的传播，解释了定常波传播的纬向非均匀性。
