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| ageing populations; demographic ageing; population ageing; ageing of the population | |||
| aging of the population; aging population | |||
| ageing population An increase in the proportion of older persons in a social group or population (Augmentation de la proportion de personnes âgées dans un groupe social ou une population); ageing population | |||
| vieillissement de la population: 2 短语, 2 学科 |
| 研究与开发 | 1 |
| 社会科学 | 1 |