That's the idea behind how we manage our water supplies. It's called “safe yield.”

那是我们管理水资源背后的原则。称为“安全产水量”。

So, this principle of safe yield—it's based on balancing what we take out with what gets recharged.

所以，这个安全产水量的原则，它基于对我们取出和得到补给的水量的平衡。

Now, I hope you see that these two ideas are incompatible: sustainability and safe yield.

可持续和安全产水量。

You know, in the state of Arizona we're managing some major water supplies with this principle of safe yield, under a method that will eventually dry up the natural discharge points of those aquifer systems.

在亚利桑那州，我们正用安全产水量管理着一些主要的水供应，用一个终将使那些含水层体系里的排放点枯竭的方法。