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一、人口与鞋产量不同步递增 随着世界经济的发展,鞋的生产和消费稳步止升,表1列出了从1950-1995年全世界人口及鞋
First, the population and the output of shoes are not increasing simultaneously With the development of the world economy, the production and consumption of shoes have steadily stopped. Table 1 lists the population and shoes of the entire world from 1950 to 1995.