demography
n.
1880, from Greek demos "people" (see demotic) + -graphy.
〔蒋〕[demo人民→人数，人口，graphy写，记录→统计] 人口统计学
〔李〕[demo=the people人民→the population人口；-graphy n.=writing著作→recording and study记录与研究→“the recording and study of the population对人口的记录与研究”→] n. the study of statistics of births, deaths, disease, etc.人口统计学▽demographic [demograph(y);-ic a.] a.人口统计的demographer [demograph(y);-er n.] n.人口统计学者