Commercial water treatment systems work to remove minerals and pollutants from water.

商用水处理系统，用来去除水中的矿物质和污染物。

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South America has produced the world's most spectacular successes with commercial water buffalo herds.

在培育商业性水牛群方面，世界上要数南美洲的成就最为可观。

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South america has produced the world's most spectacular successes with commercial water buffalo herds .

在培育商业性水牛群方面，世界上要数南美洲的成就最为可观。

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Answer: B -- About 30% of U.S. residential and commercial water goes for outdoor use.

CNN: Hey Earthling, it's Earth Day; time for a quiz

The basic direction of these reforms is to increasingly transform the water sector into market-based and commercial operations, and a resulting commodification of water.

FORBES: Access To Water May Limit India's Development

Water users, from residential to commercial, to even industrial sites could dramatically reduce their water-energy by using the sun.

FORBES: To Conserve Energy - Conserve Water