世界上大部分的饮用水——适合饮用的淡水——是由地下水提供的，它储存在岩石的孔隙和裂缝中。
Most of the world's potable water—freshwater suitable for drinking—is accounted for by groundwater, which is stored in the pores and fractures in rocks.
是人类自己首先使水变得不适合饮用的。
It was man that made the water unfit to drink in the first place.
达到这一标准需要：能提供足够能量和必需营养的饮食、适合饮用的饮水，和充分的卫生条件。
Food Utilization is the proper biological use of food, requiring a diet providing sufficient energy and essential nutrients, potable water, and adequate sanitation.
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