生育率是2.0。
一些研究表明，退休人员的社会保障体系使生育率降低了。
By some studies, the safety nets for retirees have reduced fertility rates.
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。
To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.
据协助组织这次活动的代表KoBun-Ja，牙山市的生育率是1.08，甚至远远低于全国平均水平。
Asan's birthrate is 1.08, much lower even than the low national average, according to Ko Bun-Ja, one of deputies helping organize the event.
约翰霍普金斯大学的社会学家安德鲁·切尔林说，对于为什么不同国家的生育率不同，“没有人能给出一个好的答案”。
"No one has a good answer" as to why fertility varies among countries, says sociologist Andrew Cherlin of The Johns Hopkins University.
非婚生育率正在激增。
生育率下降对发展中国家的影响可能不是立竿见影的，而是灾难性的。
The impact of dropping birth rate on developing countries may not be immediate but disastrous.
在整个非洲地区，生育率开始下降。
而且低生育率的趋势有可能加速。
And the trend towards lower fertility is likely to accelerate.
突尼斯目前的生育率与法国相仿。
最重要的就是生育率的大幅下降。
The most important of these is a dramatic plunge in fertility.
对于总生育率，目前仍存有争议。
但降低生育率无需如此严苛。
为什么生育率以此等快速和规模降低？
有些国家生育率的下降更是惊人地快。
In some countries the speed of decline in the fertility rate has been astonishing.
生育率下降，非洲能否抓住这一契机？
Africa's fertility rates are falling. Can the continent take advantage?
但是结果是生育率的增加。
财富与生育率之间的联系不足以解释一切。
The link between wealth and fertility does not explain everything.
国家内部的生活水平和生育率也存在联系。
The link between living standards and fertility exists within countries, too.
中国例外：其国内生育率的下降是强制性的。
China is an exception: its fall in fertility has been coerced.
这些相对变化中，生育率的下降是最重要的。
Of these relative changes, falling fertility is most important.
最后，低生育率使人均快速积累资本成为可能。
Lastly, low fertility makes possible a more rapid accumulation of capital per head.
生育率下降在人口结构变化中兴起了层层波澜。
The fertility fall is releasing wave upon wave of demographic change.
生育率在大幅下降。
降低生育率的目标早已实现。
The target reductions in fertility rates were reached long ago.
据中国方面的数字显示总和生育率已降至1.8。
生育率也在上升。
职业女性的生育率则更低。
The birth rate among professional women is particularly low.
这就是生育率下降的原因。
This helps to explain why their fertility rates have fallen.
这就是生育率下降的原因。
This helps to explain why their fertility rates have fallen.
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