名词
中文翻译：年龄指数
同义词：
['aging index', 'aging index number例句：1. The ageing index is a measure of how quickly people are growing older.（年龄指数是衡量人们增长速度的指标。）']
例句：
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1. The ageing index is a measure of how quickly people are growing older.
年龄指数是衡量人们增长速度的指标。
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2.The study found that the ageing index was significantly higher in the urban population.
研究发现，城市人口的年龄指数显著高于农村人口。
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3. The ageing index has been used to predict the longevity of individuals and populations.
年龄指数被用来预测个体和人群的寿命长短。