听力原文

Each year, enough water flows from the Tibetan plateau to fill the entire Yellow River, the mother river of Chinese civilization.
每年充足的水从青藏高原流出，注入了黄河--中华文明的母亲河。
Today in China alone, 300 million people depend on water from the Tibetan plateau.
现如今仅中国就有3亿人依靠从青藏高原流下的水生活。
With its profound effect on Asia's weather and water systems, the Tibetan plateau helps to sustain almost half the world's population.
由于对亚洲气候和水资源体系的深远影响，青藏高原养活了差不多一半的世界人口。
For the moment, at least. Close to the summit of Mount Everest, a forest of ice once covered much of the area. But now, thanks to climate change, much of it has gone.
至少在现在就是这样。在接近珠穆朗玛峰峰顶的地方，冰层曾经覆盖过大部分的地域。 但是现在由于气候的变化，大部分冰层消失了。
Within the next 30 years it's predicted that 80% of the Tibetan glaciers could disappear.
在接下来的30年里，预计西藏80%的冰川将会消失。
In many ways, Tibet's fragile environment is the barometer of our world. What happens to it today, in time, will affect us all.
从许多方面来说，西藏脆弱的环境是世界生态的晴雨表。它今天发生了什么，迟早会影响到所有人。

重点讲解

重点讲解：
1. depend on
依靠；依赖；
eg. We depend on the newspapers for information about what is happening.
我们依凭报纸获悉所发生的事情。
eg. Susan is a devious person and we can't depend on her.
苏姗是个狡猾的人，我们不能依赖她。
2. for the moment
暂时；目前；
eg. You must not relax your efforts for the moment.
你目前决不能松气。
eg. I think perhaps we might leave it for the moment.
我看或许我们可以暂时不谈这事。
3. at least
至少；
eg. To go abroad to study, you should at least master the language.
要到国外读书，你最起码要掌握那种语言。
eg. If he is poor, at least he is honest.
他虽然穷，但至少是诚实。
4. in many ways
从许多方面来说；
eg. In many ways children live, as it were, in a different world from adults.
从许多方面讲，小孩子可以说是生活在一个跟成人不同的世界里。
eg. We can view the problem in many ways.
我们可以从多方面来考虑这些问题。
5. in time
最终；迟早；
eg. he thief is certain to be caught in time.
小偷迟早会被抓到的。
eg. He would sort out his own problems, in time.
他早晚会解决自己的问题。