回到水污染问题上来，我想让你看看2012年在澳大利亚进行的一项研究。
To return to the problem of water pollution, I'd like you to look at a study conducted in Australia in 2012.
在中国，政府不仅试图解决空气和水污染问题，还试图解决噪音污染问题。
In China, the government is trying to solve not only air and water pollution problems but also noise pollution problems.
美国人趋向于认为水污染问题会在控制下变好，但是我们仍然面临极大的挑战。
Americans tend to think water pollution problems are pretty well under control, but we still face enormous challenges.
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