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人口老龄化
population ageing
Last Update: 2016-12-04
Usage Frequency: 10
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d. 人口老龄化
d. ageing population
Last Update: 2016-12-04
Usage Frequency: 1
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人口老龄化，2002年。
population ageing, 2002.
Last Update: 2016-12-04
Usage Frequency: 1
Quality:
* 北方国家生育率下降，人口老龄化；
lower birth rates and an ageing population in countries of the north;
Last Update: 2016-12-04
Usage Frequency: 1
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人口老龄化和人类发展的国际期刊
international
Last Update: 2011-11-09
Usage Frequency: 1
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