Every year, thousands of cubic kilometres (km3) of fresh water fall as rain or snow or come from melting ice.
每年，雨雪和融冰所带来的淡水资源有几千立方千米。
Water supply comes from the melting water of ice and snow as well as rainfall. Some places have groundwater in the form of swamp lawn and lakes.
水源补给以冰雪融水和降雨混合为主，部分地区有地下水补给，形成了大量的沼泽草地和湖泊。
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