Limestone has a strange property that it dissolves in rain water.

灰有一个奇怪，能溶解于雨水。

We observe that when it rains, water is pressed from the air.

我们也可看到下雨时，水是从空气中挤出来。

The rain water is then brought down to a boiler behind the range.

雨水被引到炉灶后锅炉里。

Take the planet COROT-7b for example, where instead of raining water it rains down rocks.

就拿 COROT-7b 行星举例来说，在这个星球上，下不是雨而是岩。

Now what happens is, rain water, that heavy rain water sort of sits on top of that bedrock sanding clay.

现在所发生是, 雨水, 暴雨冲刷基岩上砂粘土。

After an hour of rain, water had pooled at the surface, but only two earthworms emerged.

下了一个小时雨后，水已经聚集在土壤表了，但是只有两只大型蚯蚓浮出了表。

Their rosette formation of their leaves form all kinds of tiny basins where rain water can collect.

它们是丛生叶序形成了各种小盆状结构能够承接雨水。

It helps sewer systems to drain rain water quickly and guide the water to collection facilities for recycling.

该工程有助于排水系统迅速排干雨水，将雨水引导至收集设备并进行循环。

These tough plants live on the branches of trees and extract their food from the air or from rain water.

这些坚韧植物生长在树枝上从空气和雨水中获得食物。

Pieces of slate are put on the roofs of houses, to keep out the rain. Water cannot pass through slate.

也放在屋顶上, 用来挡雨。水是透不过。

EACH FLUSHED, OCCASIONALLY, BY RAIN WATER.

每个人偶尔都会被雨水冲刷。

Yulia says, " I'm not drinking rain water or runoff from the roof."

Yulia 说， “我不喝雨水或屋顶流出水。

It rains. We are thirsty. We drink the rain water.

下雨了。我们渴了。我们喝雨水。

So when it rains water comes in here, so that's also a dirty kind of water.

所以下雨时候水会流到这里，所以那也是一种脏水。

They ate bad bread and old meat, but they had lots of rain water to drink.

他们吃是坏包和老肉， 但他们有很多雨水可以喝。

And if you weave it really well, you might even be able to get a receptacle to hold rain water.

- 如果你编织得很好，你甚至可以得到一个盛雨水容器。

But as the snow continues to melt and the rain water runs down hills into creeks and rivers, the flooding threat isn't over.

但是，随着雪继续融化，雨水顺着山坡流入小溪和河流，洪水威胁还没有结束。

Rain water that must be drunk before it touches the ground, then he can't take the medicine until it rains.

雨水必须在接触地之前饮用 然后他不能服药 直到下雨。

GUPTA (voice-over): To manage that, Hope has turned her pool into a makeshift reservoir, collecting rain water for even the most basic needs.

古普塔(画外音): 为了做到这一点，霍普把她游泳池变成了一个临时水库，为最基本用水需求收集雨水。

When it comes to drinking water, it seems like the best option would be to collect rain water and purify it.

说到饮用水，似乎最好选择是收集雨水并进行净化。