... 人口结构变化趋势 Demographic Trends 人口结构的变化 demographic changes 人口阶级结构变化 interclass movement ...
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他们将这一趋势归结为人口结构的变化：根据美国人口统计局的数字，2007年25-29岁年龄段的美国人约有2100万，而2002年时是1880万。
They attribute the trend to demographics: according to the Census Bureau, last year, there were an estimated 21 million people ages 25 to 29, up from 18.8 million in 2002.
认真分析温州人口结构变化的规律与趋势，深刻认识社会保障制度所面临的严峻形势，对于加快完善温州社会保障制度具有重大的现实意义。
It is of significance in practice to analysis the variance law and trend of Wenzhou population structure and understand the severe situation that the social security system environment.
第二，发达国家人口结构的变化也助长了小型车销售的趋势：社会上老年人口的增多，使得大型豪华车渐渐失宠，而德国高端车首当其冲。
Second, demographic shifts in rich countries favour smaller vehicles: older people tend not to buy large, powerful cars, which is particularly bad news for Germany's premium carmakers.
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