These researches are important to prepare against and reduce disaster and to improve city environment quality.

这些研究为我国城市排水减灾、防洪减灾、提高城市环境质量起着重要的作用。

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These researches are important to prepare against and reduce disaster and to improve city environment quality.

这些研究为我国城市排水减灾、防洪减灾、提高城市环境质量起着重要的作用。

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