that simply cannot survive without it. 没有淡水 便无法生存
to ensure that it is always available to meet our every demand. 来确保有足够淡水满足我们的需求
makes it our planet's greatest architect. 使其成为地球上最伟大的建筑师
All it took was a million years of evolution... 这一切需要生物百万年来的演化
It seems he's overstayed his welcome. 看来得换一个地方了
It has travelled a thousand miles from where it fell as rain. 水流自降雨地流到此处已经穿越了近两千公里