Professor antonio golini is a demographer at the university of rome 罗马大学安东尼奥教授是位人口统计学家。
Demographers say a rate of 2 . 1 is needed to keep a population from declining 人口统计学家指出,生育率必须达到2 . 1 ,才能防止人口减少。
Arab - americans make up 3 million of the population in the united states , according to demographers 人口统计学家称,目前阿拉伯裔美国人共有三百万。
Demographers have calculated that the world ' s population will double by the end of the twentieth century 人口统计学家推算到了二十世纪末世界人口会加倍。
Millions of soon - to - retire baby boomers , say demographers , will propel this trend for years to come 人口统计学家称,成百万行将退休的战后一代将此趋势烧得更旺。
Demographers also expect strains on the household registration system , which restricts internal migration 人口统计学家同时预测阻碍国内移民的户籍制度将受到压力。
Demographer william frey says immigrants with young families will help keep the united states competitive 人口统计学家佛瑞表示这些年轻的家庭会帮助美国保持竞争力。
Demographers expect the global population to peak at around 10 billion ( it is now 6 . 5 billion ) by mid - century 人口统计学家预测,到本世纪中叶,世界人口总数将接近100亿(目前为65亿) 。
One demographer has said the 300 millionth person would likely be a latino boy given current u . s . population trends 美国一位人口统计学家曾说,从目前美国的人口走势来看,这第三亿个人可能会是一个拉丁裔男婴。
One demographer * has said the 300 millionth person would most likely be a latino boy given current u . s . population trends 美国一位人口统计学家曾说,从目前美国的人口走势来看,这第三亿个人可能会是一个拉丁裔男婴。