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

194. no longer reach the sea.
     已不再入海
195. There is a finite amount of freshwater on Earth...
     地球上淡水资源有限
196. ..so humans have devised extraordinary means
     因此人类设计了非凡的方法
197. 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
198. We now control freshwater...
     我们如今大规模地
199. ..on a colossal scale.
     控制淡水资源
200. The largest irrigation system on Earth
     地球上最大的灌溉系统

来自《行星地球 第三季 第四集 Planet Earth S03E04 淡水》第 197 行