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大学英语六级作文压题点评：人口老龄化
Of the world's population aging and the aging of the population in developed countries the same time, China's aging population has intensified. The aging of the population have is social progress and economic development.
Of the world's population aging and the aging of the population in developed countries the same time, China's aging population has intensified. The aging of the population have is social progress and economic development.
