(54) Overall Dependency Ratio （总抚养比率）: The number of persons aged under 15 and 65 and over per 1 000 persons aged between 15 and 64.
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overall dependency ratio
整体抚养比
以上为机器翻译结果，长、整句建议使用 人工翻译 。
When fertility is high and a country is young (median age below 20), there are huge numbers of children and the overall dependency ratio is high.
一个国家生育率高，表示这个国家很年轻（中位年龄在20岁以下），小孩数量庞大，依赖性比例相当高；
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