灌溉的英语单词是 irrigation。它来源于拉丁语 irrigatio，意思是“浇灌”。

下面是一些例句：

Irrigation is the process of applying controlled amounts of water to plants. 灌溉是指向植物提供控制量的水的过程。

The farmers used irrigation to water their crops. 农民们使用灌溉来给他们的庄稼浇水。

Irrigation can help plants grow better and produce higher yields. 灌溉可以帮助植物生长更好并产出更高的收益。