working-age population的用法和樣例：
例句
- A widening age gap exists between the older populations in the West and the large working-age populations in developing countries.
在西方國家的老年人口和發展中國家大的工作年齡人口之間存在寬的年齡缺口。 - As birth rates decline, the proportion of children shrinks and the working-age population bulges, as is happening now in Africa.
因為生育率下降，兒童比例減小，而勞動年齡人口卻激增，非洲當前正是如此。
