人口老龄化
aging of population
aging of populations
ageing of population
Aging of the population
Aged tendency of population
the aging of people
population aging
ageing population
aging population
population ageing
the aging of population
the aging of the population
aging tendency of population
elderly population
Old age patients
Aging
ageing
Aging process
human aging
人口老龄产业
population aging industry
非劳动年龄人口
non-working age population
婚龄人口
population of marriageable age
劳动年龄人口
the populatin of working age
老人口腔健康生活评量表
geriatric oral health assessment index