人口統計的用法和樣例：
例句
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我手頭正好有最新的人口統計資料。
I happen to having the latest population statistics with me. -
人口統計學(xué)對人口特征，例如數量、增長(cháng)情況、密度、分布和人口動(dòng)態(tài)統計等進(jìn)行研究的學(xué)科
The study of the characteristics of human populations, such as size, growth, density, distribution, and vital statistics.
