irrigation purpose的用法和樣例：
例句
- The man-made ditches drive mainly at the artificial channels that excavated for drainage and irrigation.
人工溝渠是指以排水和灌溉為主要目的的人工挖掘的水道。 - The technologies, which include treadle pumps and drip irrigation systems, enable farmers to produce vegetable crops for consumption and sale.
這項技術(shù)，包括踏板抽水和滴流灌溉系統，使得農戶(hù)可以用于蔬菜灌溉，達到自行消費和出售的目的。
