age composition of population
age composition of population
人口年龄构成
以上为机器翻译结果，长、整句建议使用 人工翻译 。
-
Many of the people that will contribute to it have already been born, so short of some catastrophe that kills off large numbers of people, or some Viagra-fuelled leap in birth rates, population numbers and age composition can be predicted with fair accuracy for decades ahead.
ECONOMIST: Demographics: Greying globe | The