But the amount of water required, especially in a desert, is unprecedented.

但是水量的需求，尤其在这样一个沙漠，是史无前例的。

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Need for water is also a subjective term, but typically it refers to the minimum amount of water required to satisfy a particular purpose or requirement.

水的需要也是个主观术语，它主要是指满足特殊用途或需求的最小用水量。

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Water use was reduced by 32 per cent with the Jerseys and land required to produce the amount of cheese was 97,448ha, or 11 per cent less than for the Holsteins.

水的使用减少了32%，是由于生产那些数量的乳酪所需的泽西奶牛和土地要97,448公顷，或者说比荷斯坦奶牛的少11%。

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Instead of flooding the field, just the required amount of water "drips" slowly through intermittent holes in the tubes directly onto the plant's roots.

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The water contains only the minimal amount of chlorine required by law.

CNN: Best-testing water in U.S.: White Salmon, Washington