The study of the surface runoff system model is the crux involving relevant concentrational flow theory in hydrology.

地面径流系系统模型的研究，是涉及水文学有关汇流理论的核心问题。

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The study of the surface runoff system model is the crux involving relevant concentrational flow theory in hydrology.

地面径流系系统模型的研究，是涉及水文学有关汇流理论的核心问题。

youdao