age classes的用法和樣例：
例句
- Immigration would not, on current trends, make up the shortfall in the working age population.
移居入境是不樂觀的，在現實的趨勢來看，還不足以去彌補工作年齡階段的人口。 - The invention discloses a separated candida cell group, and most cells in the cell group are in the same age stage.
本發明公開了一種分離的念珠菌細胞群，所述細胞群中大多數的細胞處於同一年齡階段。
