Nationwide, China's available water supply per person is one-fourth the world average.

中国全国的人均可用水供应量仅为世界平均水平的四分之一。

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If the locally available water supply is not sufficient to meet the minimum needs of the displaced, arrangements must be made to bring in water by truck.

如果本地可用水不能满足难民的最低需求，必须安排卡车等运输工具运水进来。

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The area of a basin may be limited by elevation changes, by the size that can be covered uniformly by the available water supply on permeable soils, or by cropping factors.

格田面积受限于地面高度的变化、现有水量均匀覆盖于渗透性土壤的面积大小及耕作因素。

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High population density, a poor ratio of available water to demand, and regional imbalances in available water supplies are serious challenges for China in managing its usable water supply.

FORBES: Quenching China's Thirst For Water

Going back to the simple Law of Supply and Demand, our only solution is to increase the supply of clean water available in these communities.

FORBES: Investors Are The Key To Solving The World's Water Problems