复数： irrigations

The military had come and built major irrigation works .

主要的灌溉设施都是部队建设的。

Large towns and extensive irrigation canals were abandoned .

大城镇和大量的灌溉渠被遗弃。

Irrigation isn 't a long-term global fix .

灌溉不是全球性的长远解决方案。

Then the federal government built a vast irrigation system .

后来联邦政府建造了一个巨大的灌溉系统。

Global warming will increase droughts and interfere with irrigation .

全球变暖会使沙漠增加并给灌溉增添困扰。