Macrodemography
总体人口统计学
🗣️ 情景例句
He's so funny.
他喜欢开玩笑。
What kinds of vegetables do you have?
你吃什么样的蔬菜？
This decline in vigour with the passing of time is called ageing.
生命力随时间的流失而衰退叫做衰老。