de·mog·ra·phy
noun/dɪˈmɒɡrəfi/
/dɪˈmɑːɡrəfi/
[uncountable]- the changing number of births, deaths, diseases, etc. in a community over a period of time; the scientific study of these changes
人口统计；人口统计学；人口学 - the social demography of Africa
非洲社会人口统计
Word Originlate 19th cent.: from Greek dēmos ‘the people’ + -graphy. - the social demography of Africa