在这座山的北面，海拔900米以上的位置有一个非常重要的纯净水水源地。
More than 900 metres high, on the mountain's north face, lies an all-important source of pure water.
一个蓄水的简便方法就是直接在杂货店里买瓶装的纯净水。
One easy way to store water is to buy purified drinking water in gallon plastic jugs at the grocery store.
这些老人共同所拥有的就是远离城市的纯净水源，没有化学物质和毒素。
What they all have in common is pure water sources located far from any city, free from chemicals and toxins.
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