demographers

In 2002, James Vaupel of the Max Planck Institute for Demographic Research in Rostock, Germany, startled demographers by pointing out that every estimate published of the level at which average life expectancy would level out has been broken within a few years.

2002年，德国罗斯托克马克斯-普朗克人口研究所（Max Planck Institute for Demographic Research）的詹姆斯•沃佩尔（James Vaupel）指出，每次公开发布的对平均寿命趋稳水平的估计都会在几年内被打破，这令人口统计学家感到吃惊。

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In other countries, demographers have also grappled with theories of baby booms linked to specific events.

在其他国家，人口统计学家还坚持着婴儿潮与特定事件有关联的理论。

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Selectivity of human migration has long been the focus of demographers and economists.

摘要人口迁移的选择性一直以来都是人口学家和经济学家关注的焦点.

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Coddled and helicoptered, catered to by 24-hour TV cable networks, fussed over by marketers and college recruiters, dissected by psychologists, demographers and trend-spotters, the millennial generation has come fully into its own.

他们被娇惯，享受24小时有线电视网，被市场营销人员和大学招生人员过分关心，被心理学家、人口学家和时尚达人剖析，如今他们终于形成了气候。

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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.

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Selectivity of human migration long been the focus of demographers and economists.

人口迁移的选择性一直以来都是人口学家和经济学家关注的焦点

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Demographers talk about a " low-fertility trap "

人口学家称之为 “ 低生育陷阱 ”

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In the public's eyes , demographers have a checkered reputation.

民众对人口统计学者的评价不一.

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Demographers reckon that three-quarters of humanity could be city-dwelling by 2050, with most of the increase coming in the fast-growing towns of Asia and Africa.

人口统计学家估计,到2050年,城市居民可能会占总人口的四分之三,其中大部分增长来自亚洲和非洲快速发展的城镇。

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Many demographers believe that around the end of the century, the global population will gradually level off.

许多人口统计学家认为在本世纪末期的某个阶段，世界人口将趋于平稳。

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Demographers reckon that at least three-quarters of Egyptians actually live in urban areas.

人口统计学家认为,至少有四分之三的埃及人实际上是生活在城市.

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Demographers, however, point out that the'single" trend will have a profound effect on American institutions.

不过，人口学家们指出，“单身”趋势将对美国的公共机构产生深远的影响

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Demographers and economists have put great concern and focus on the new theory of Demographic Dividend and made some research in this field.

人口红利理论的出现随即得到国内学者的高度重视和广泛关注，并在该领域取得一些研究成果。

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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.

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This year, World Habitat Day falls during the month when demographers predict our planet's seven billionth inhabitant will be born.

今年，在世界人居日所在的这个月，据人口学家预言，将诞生我们星球上第70亿个居民。

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