农业用水约占人类总耗水量的70%。

Farming accounts for roughly 70% of human water consumption.

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不同土壤类型膜下滴灌棉花产量、总耗水量及水分利用效率存在明显差异。

There are distinct differences between yield, total water consumption and water use efficiency in different soil types.

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这些都很令人欣慰，不过你应该知道，农业灌溉消耗的水量占到了人类总耗水量的70%。

This is all reassuring—until you remember that irrigated agriculture accounts for 70 percent of the fresh water used by humans.

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