Market researchers often segment the population on the basis of age and social class.
市场研究人员常常按年龄和社会阶层划分人口。
He conjectured that the population might double in ten years.
他推测人口在十年后可能会增加一倍。
A third of the population is living at or below the poverty line.
三分之一的人口生活在贫困线或以下。
Growing levels of pollution represent a serious health hazard to the local population.
日益严重的`污染对当地人民的健康构成了重大威胁。