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1955年以后,日本的经济高度发展,在发展的过程中,人口和资产急剧地向城市集中。原来暴雨时经常淹水的低洼也修建了住
Since 1955, Japan’s economy has been highly developed. In the course of its development, population and assets are drastically concentrated in urban areas. The original heavy rain often flooded low-lying also built live