demographers

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

人口遷移的選擇性一直以來都是人口學(xué)家和經(jīng)濟(jì)學(xué)家關(guān)注的焦點(diǎn).

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

民眾對(duì)人口統(tǒng)計(jì)學(xué)者的評(píng)價(jià)不一.

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Demographers talk about a " low - fertility trap "

人口學(xué)家稱之為 “ 低生育陷阱 ”

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

人口統(tǒng)計(jì)學(xué)家認(rèn)為,至少有四分之三的埃及人實(shí)際上是生活在城市.

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Demographers say a rate of 2.1 is needed to keep a population from declining.

人口統(tǒng)計(jì)學(xué)家指出,生育率必須達(dá)到2.1,才能防止人口減少.

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

摘要人口遷移的選擇性一直以來都是人口學(xué)家和經(jīng)濟(jì)學(xué)家關(guān)注的焦點(diǎn).

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Demographers have calculated that the world's population will double by the end of the twentieth century.

人口統(tǒng)計(jì)學(xué)家推算到了二十世紀(jì)末世界人口會(huì)加倍.

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