A water purification system includes an activated carbon filter and a reverse - osmosis ( RO ) filter.

一种水净化系统,包括活性炭过滤器和反渗透 ( RO ) 过滤器.

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For the slum family struggling to get clean water, there is a $ 43 water - purification system.

对于那些难以得到干净用水的贫民窟家庭, 一款售价43美元的水净化设备专门为他们而开发.

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Answer: Because every water purification system leaves you exposed to some level of dangerous contaminants!

答案: 因为每个净化水系统让你远离一些处在危险污染水平的饮用水.

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