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It can also help to purify the water quality, reduce pollution and improve environment.

荷花还可净化水质、减少污染、改善环境。

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Breaking down electronics into small parts for refiners to melt and purify is another part of the business.

VOA: special.2010.11.01

And much easier to purify and know what you have at the end, than if you're trying to harvest it from a whole complex organism.

最终产品的纯化和鉴定也比,从复杂的生物体上提取和鉴定容易

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The miners have been sent rubber boots as well as chlorine to purify water from underground sources, Manalich said.

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In Bekaa Valley, Mercy Corps has distributed hygiene kits, tablets to purify water, buckets and jerry cans to refugees.

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The website HowStuffWorks has a fascinating article about RISUG that covers its genesis as a method to purify drinking water.

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