Let the sky bluer, the water cleaner, let's start small.

⊙、让天更蓝，让水更清，让我们从小事做起。

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We should make a lot of work before we can make the sky bluer and the water cleaner in our city.

要使我们城市的天更蓝水更清，我们还的做大量的工作。

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While not strictly necessary, your pond can benefit from having a pump and biological filter to keep water cleaner.

虽然不是绝对必要，你可以受益于池塘有一个泵和生物过滤水保持清洁。

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Many people think the search for cleaner energy leads only to renewable resources like sun,wind and water.

VOA: special.2009.10.23

The program known as Master Meter provided these families with ease of access, cleaner water and lower costs.

VOA: standard.2010.08.04

Some fish farmers are trying to take aquaculture offshore where the water is cleaner and currents are stronger.

FORBES: Magazine Article

Today, our air and water are cleaner, pollution has been greatly reduced, and Americans everywhere are living in a healthier environment.

WHITEHOUSE: Presidential Proclamation -- Earth Day

Not only does the lack of laundry mean cleaner water, it means that people can be spared hours of tedious, backbreaking labor.

FORBES: Nanotechnology May Lead To The End Of Laundry