It lives in our oceans and in freshwater ponds.

生长在海洋和的池塘里。

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

它通常生长在非常的溪流的两侧。

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

有输送的管，但它们经常漏或破裂。

This is the end of the rivers' journey.

这之旅的终点。

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

教授，您知道海比的密度大，但海的密度并不各处完全一律。

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体的影响。

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

不过他发现在海和的混物中，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资源的消耗。

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

但冰构成的，而不咸海。

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

但非鸟兽脚类恐龙适应了环境的生活。

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，全球对的需求每 20 翻一番。

They are permanent floating sheets of frozen freshwater.

它们永久的浮冰。

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

自1970以来，物种的数量平均减少了83%。

And also you can really have as much freshwater as you want.

此外，还有取之不尽的。

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。

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

世界上最大的湖什么？

Piranha are native to South American freshwater rivers.

食人鱼一种原产于美国南部的鱼。

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

答案五大湖。五大湖占世界上量的20%。

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

专家还研究了气候变化对环境的影响。

70 percent of all the world's fresh water.

全世界 70% 的资源。