This method is universal and practical, and can be used as the theory basis and practical technology in optimization design of urban rainwater utilization project.

该方法具有一定的通用性和实用性，可以作为城市雨水利用工程优化设计的理论依据和实用技术。

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Accordingly, the technology of rainwater utilization is behindhand and short of systematization.

雨水利用技术还较落后，缺乏系统性。

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