It lives in our oceans and in freshwater ponds.

生长在海洋和淡水的池塘里。

It is often growing on the sides of very freshwater streams.

它通常生长在非常淡水的溪流的两侧。

There are water pipes that bring fresh water, but they leak or break a lot.

有输送淡水的水管，但它们经常漏水或破裂。

This is the end of the rivers' journey.

这淡水之旅的终点。

You're aware, professor, that salt water is denser than fresh water, but this density isn't uniform.

教授，您知道海水比淡水的密度大，但海水的密度并各处完全一律。

But we can see their effects on some of the largest bodies of fresh water on earth.

但我们可以看到它们对地球上最大的淡水水体的影响。

But he found that potatoes grew better than the other vegetables in the combination of sea and fresh water.

过他发现在海水和淡水的混物中，土豆比其他蔬菜长得更好。

And reduce the human consumption of freshwater resources from lakes and rivers.

并减少人类对湖泊和河流淡水资源的消耗。

But ice is made of fresh water, not salty sea water.

但由淡水构成的，而咸海水。

But Natovenator was adapted to a life that involved a freshwater environment.

但非鸟兽脚类恐龙适应了淡水环境的生活。

And our current rate of consumption, the global demand for fresh water doubles every 20 years.

以我们目前的消耗速度，全球对淡水的需求每 20 年翻一番。

The effects of climate change on freshwater environments have also been studied.

专家还研究了气候变化对淡水环境的影响。

Freshwater bugs would experience a 38 percent increase over the same period.

淡水昆虫的数量在未来30年里将增加38%。

They are permanent floating sheets of frozen freshwater.

它们永久的淡水浮。

Freshwater populations have decreased by an average of 83 percent since 1970.

自1970年以来，淡水物种的数量平均减少了83%。

Piranha are native to South American freshwater rivers.

食人鱼一种原产于美国南部的淡水鱼。

At the South Pole, the continent of Antarctica, holds 70% of the world's fresh water.

在南极那儿拥有世界70%的淡水。

What is the world's largest freshwater lake by volume?

世界上最大的淡水湖什么？

Together it's the Great Lakes that contain about 20 percent of the world's fresh water.

答案五大湖。五大湖占世界上淡水量的20%。

70 percent of all the world's fresh water.

全世界 70% 的淡水资源。