大面积的农田损失年复一年，这主要是由于土壤侵蚀，水源枯竭和城市化进程。
Large areas of croplands are lost year after year, due mainly to soil erosion, water depletion and urbanization.
随着生态系统发生变化，沙漠面积不断扩大，粮食生产日渐减少，水源枯竭，人口也不得不迁移，搬到更适宜居住的地区。
As ecosystems change and deserts expand, food production diminishes, water sources dry up and populations are pressured to move to more hospitable areas.
曾经给这些井提供水源的蓄水层已被宣告枯竭。
The aquifer which had once fed the wells was pronounced dry.
长时间干旱，水源都枯竭了。
长时间干旱，水源都枯竭了。
尽管冰川消融在短期内提供了充足的水源，然而却也预示这是最后的晚餐，奔流在亚洲土地上的诸条大河将最终枯竭。
Even if melting glaciers provide an abundance of water in the short run, they portend a frightening endgame: the eventual depletion of Asia's greatest rivers.
美国东南部最近遭遇到干旱，亚特兰大刚考虑这几年要遭受水灾，不料却要为城市水源可能枯竭而担忧了。
The SE United States had drought recently, where the city of Atlanta feared its drinking water source would dry up, when in the years just preceding this the region was under deluge.
季节性因素应受到认真考虑。一处在雨季里很充足的水源可能在其他时期枯竭。对当地情形的了解是至关重要的。
Seasonal factors must be carefully considered. Supplies that are adequate in the rainy season may dry up at other times. Local knowledge will be essential.
有的村遇干旱年份，水源的出水量就会明显减少甚至枯竭，村民的生活饮水就难以保证。
The quantity of source water in some villages reduced obviously or dried up in dry year, so that the villagers drinking water is difficult to ensure.
有的村遇干旱年份，水源的出水量就会明显减少甚至枯竭，村民的生活饮水就难以保证。
The quantity of source water in some villages reduced obviously or dried up in dry year, so that the villagers drinking water is difficult to ensure.
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