and you see a diagram of it

那么你可以看到右边的图
on the right and people creating one on the left.

和在左边人们制造的一个
They're easy to do; you just have to drill the hole,

这些很容易做到你只需要打个洞
go down and find a water source, and then pump the water up

到底下找到水源然后将水
with a pretty inexpensive little pumping system.

用一套并不昂贵的水泵系统泵上来
It can be done by hand, or it can be done mechanically, or with a pump,

它可以手动完成或水泵完成
but one way or another the water can be brought to the surface.

但不管用哪种方法水都可以被带到地表
Now, one of the questions is how

现在其中的的一个问题是
clean the water is that gets brought to the surface.

怎样净化被带出地表的水
I saw a statistic just the other day

我某天看到一个统计调查
that there was concern in Bangladesh, in particular,

主要是有关孟加拉的担忧
that the aquifers that are being

说的是水从蓄水层被抽上来的