来自《耶鲁大学开放课程：有关食物的心理学、生物学和政治学第9集第9集》

then the amount of energy it takes to bring water

以及把水从一个地方运送到另一个地方
from one place to another is part of that overall picture.

所消耗的能量总数也是整体图景的一部分
In the developing world,

在发展中国家
irrigating crops becomes very important, because of course,

灌溉稻谷变得十分重要
some of these areas are quite

因为其中的一些地区是
prone to lack insufficient water to grow these crops.

很容易于在缺水的情况下种植这些作物的
There's a particular type of well that

这里有一个特殊的水井的形式
very often gets used in these areas called a tube well,

在这些地区被经常用到叫做管道井
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