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Do you know about the Environmental Protection Agency or EPA?
你知道环境保护局或者是EPA吗？
Yes. They conduct research on many different topics around the United States.
知道。他们在美国各地进行许多不同主题的研究。
One area they are studying, together with Canada, is the Great Lakes.
他们正在研究的领域之一是五大湖，和加拿大一起。
I've heard of them. Don't they make up the largest freshwater system on Earth?
我听说过五大湖。它们不是构成了地球上最大的淡水系统吗？
That's right! The last I heard, there were about 30 million people living around them.
对的！我听到的最新的消息说大约有13000万人住在五大湖附近。
Wow, that's a lot. That could make a significant impact to the environment.
哇，人很多啊。那会对环境产生很大影响。
That is exactly what the EPA is studying. They want to keep the lakes clean.
这正是EPA正在研究的。他们希望保持湖水干净。
Well, every person will have to do their part to help.
嗯，每个人都应该尽其所能去保护水资源。
