污水再生利用不仅能有效保护有限的优质淡水资源，还能满足不断增长的用水需求。
Wastewater recycling could not only be effective on protecting limited quality of freshwater resources, it could also meet the growing demand in water supply.
污水再生利用不仅能有效保护有限的优质淡水资源，还能满足不断增长的用水需求。
Wastewater recycling could not only be effective on protecting limited quality of freshwater resources, it could also meet the growing demand in water supply.
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