名詞 irrigation:

1. supplying dry land with water by means of ditches etc
2. (medicine) cleaning a wound or body organ by flushing or washing out with water or a medicated solution

1. A long narrow trench or furrow dug in the ground, as for irrigation, drainage, or a boundary line.
   溝渠，排水溝，水道在地面上狹長的溝渠或細(xì)溝，用于灌溉、排水或用作分界線
2. Water is channelled through a series of irrigation canals.
   把水引入一系列灌溉渠中。
3. We used the money to set up an irrigation project.
   我們把錢用在興建灌溉工程上了。
4. Irrigation is needed to make crops grow in dry regions.
   干旱地區(qū)需要灌溉才能使作物生長。