To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

为了做出更准确的人口预测，人口统计学家必须比现在更多地了解生育率的社会和经济决定因素。

youdao

But Mr. Cai and other demographers estimate the real rate is closer to 1.5 children.

但是蔡先生和其他人口统计学家估计，真实的比率是接近1.5。

youdao

Because this is a demographic that has traditionally been overlooked by demographers.

因为这一部分人口一直以来都被人口学家忽略。

youdao

The state-by-state information is not yet complete, but Marc Perry says demographers found a clear trend in population growth.

VOA: special.2011.03.14

"The government's own figures, according to demographers at Oxford University,show that the indigenous British the people who've been here."

VOA: standard.2009.10.23

Don't ask the sociologists, the demographers, the advertising agencies, and certainly not the tobacco companies.

CNN: No Easy Answer To Teen Smoking

Still, many Chinese and Western economists and demographers say that urbanization can be a double-edged sword.

WSJ: China's Population Shifts to Cities

Around 1970, many African-Americans began moving back to the South, historians and demographers say.

CNN: Family roots lure many African-Americans back to South