求翻译：本论文在对造纸企业用水现状进行研究的基础上，提出了基于工业生态学理论和循环经济理论的造纸企业用水系统集成优化理论方法，并以此理论方法为指导，进行造纸企业用水系统的梯级利用与优化研究，从源头上减少新鲜用水量，生产过程中提高水的重复利用率，减少排污量。是什么意思？

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