They know the value of water. 他们知道水的价值

37. We have forgotten that resources are scarce.
    我们忘记了资源是稀缺的
38. 500 million humans live in the world's desert lands,
    5亿人生活在沙漠地区
39. More than the combined population of europe.
    比欧洲的人口总数还要多
40. They know the value of water.
    他们知道水的价值
41. They know how to use it sparingly.
    他们知道如何节省使用
42. Here, they depend on wells replenished by fossil water,
    这里 他们依靠以原生水补充的水井
43. Which accumulated underground in the days when it rained on these deserts,
    这些水是在25000年前沙漠下雨的时候

来自《家园 第二部分 Home Part2》第 40 行