dependency ratio

A rising dependency ratio means fewer working-age adults are supporting an increasing number of retirees.不断上升的抚养比意味着更少的适龄劳动人口正在供养越来越多的退休人员。

Countries with very low fertility rates face an unsustainable dependency ratio within two decades.生育率极低的国家在二十年内将面临不可持续的抚养比。