An expert on farmland irrigATion says thAT underground irrigATion is the best way to wATer crops. It puts wATer where it is most needed AT the roots.

一位灌溉专家说，地下灌溉是给作物供水的最佳方法，因为它把水灌到最需要的地方。即根系近旁。

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Other things that impressed me deeply are the underground Jiaohe and Gaocang, the dried ancient corpuses and the underground irrigation canal networks.

我印象深刻，是地下蛟河和Gaocang，干古语料和地下灌溉渠网的其他事项。

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Theoretical analysis of local-control irrigation, i. e. , non-pressure underground irrigation, is conducted, and soil water movement equation is presented.

对局部控水灌溉（无压地下灌溉）技术从理论上进行了分析，并给出了其土壤水分运动方程。

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The arborist added that sophisticated underground irrigation systems water the trees.

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But modern drip irrigation uses underground computerized probes and long plastic tubes to slowly release water over long distances.

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Now, in this warren of rooms, except for the muffled sound of the crowd above, the only sound was the whooshing of an underground stream, redirected here from Roman times for irrigation and cleaning.

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