aging population的用法和樣例：
例句
- Unfortunately the elderly population in America is increasing fast.
不幸的是，在美國的老年人口正在增加快。 - Following the accelerated speed of population aging in China, the problem of supporting rural old-age population has become a focus of all society.
隨著(zhù)人口老齡化速度的加快，我國農村老年人口的養老問(wèn)題備受關(guān)注。
