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flood-prevention project 防洪工程transportation arteries 条通枢纽Three Gorges project 三峡工程the Three Gorges Dam 三峡大坝the Three Gorges Reservoir 三峡水库the Yangtze River delta 长江三角洲the south of the lower reaches of the YangtzeRiver 江南水乡the middle and lower reaches of t