ditch irrigation

• 沟灌

ditch irrigation的用法和样例：

例句

1. Principles outlined for furrow irrigation apply to related methods of irrigation.
   简述的沟灌原理也适用于相近的灌水方法。
2. Extensive land leveling is often required because the topography must be smoother than for furrow irrigation.
   由于畦灌的地形必须比沟灌的平坦，因此，常常需要大面积平整土地。