历史洪水在洪水频率计算中起到了重要作用。

Large historical flood discharges can play an important role in hydrologic frequency analysis.

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浑河是历史上发生洪水比较频繁的河流。

Hunhe river is a frequently flooded river in history.

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浑河是历史上发生洪水比较频繁的河流。

Hunhe river is a frequently flooded river in history.

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