"It's one of the most cost-effective water treatment systems in the world," he says.

“这是全世界最省钱的净水系统之一，”他说。

youdao

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。

youdao

Much of our refuse could actually be put to good use, if the efficient garbage treatment systems were available.

如果实行有效的垃圾处理系统，大部分垃圾实际上可以得到很好的利用。

youdao

They were put to work as cleaners at fish farms along the Mississippi River and in wastewater treatment systems.

VOA: special.2009.12.15

So the proposal is that sewage treatment systems should be upgraded to deal with this.

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Three years later she decided to go directly into selling her own water-treatment systems.

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For two weeks 20 Bechtelians tried to estimate the cost of repairing roads, airports, hospitals, power plants and waste treatment systems.

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