We use clean water to grow food.

我们用干净的水种植作物。

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Medical experts say the first step in treating a wound is to use clean water. Lake or ocean water should not be used.

医学专家指出，处理伤口的第一步就是使用干净的水来清洗，但不能使用湖水或海水。

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However, many people in Asia and Africa don't have enough clean water to use.

然而，亚洲和非洲的许多人没有足够的清洁用水。

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The government could also use violations of other federal laws such as the Clean Water Act to collect money for the spill.

VOA: special.2010.06.04

Water quality issues also create risk for companies, from stricter pollution standards on their own effluent to other entities polluting water upstream, requiring them to clean up water prior to use.

FORBES: A New Tool To Manage Companies' Growing Water Risks

In my last post, I talked about how critical clean and efficient use of water is to local economies as well as to our very existence.

FORBES: Water Technologies Part II: Market Opportunities and Challenges for Water Innovation

Last Friday, the U.S. Environmental Protection Agency (EPA) amended an obscure clean water regulation that restricted use of aluminum in automobiles because of a potentially harmful byproduct created in the manufacturing process.

FORBES: Magazine Article