--it's projected to be unusable in a period of twenty years.

二十年后该资源便会被消耗殆尽
What does that mean?

这意味着什么
Well it means that the local water resource is depleted,

这意味着当地的水资源已经耗尽
so to the extent that these farmers can get water that's relatively local--

甚至于农民本来可以从当地获得水资源
although nothing is local, it's not like each farmer has a well

因为已经没有水也不是每个农民
that goes into this aquifer and water is pumped there,

都有深达蓄水层的井水可用
it's still transported some distance--

这就需要远距运输水
but it means water will have to come in from some other place.

意味着不得不从其他地方弄水
Well where is that other place, and

其他地方的水井
is there water around to do this kind of a thing?

或者是其他有水的地方
This is a pretty alarming statistic.

这是一个非常令人担忧的数据
We can talk about the

我们来讨论一下