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20 0 0年 6月 11日 ,龙江中下游出现超 5 0年一遇的大洪水。在统计大量实测资料的基础上 ,对这场洪水的成因、特性等方面进行了分析
On June 11, 2000, a major flood hit 50 years in the middle and lower reaches of the Longjiang River. Based on the statistics of a large number of measured data, the causes and characteristics of the flood are analyzed