America is the only rich country that, having fallen below the replacement rate, has risen back above it.
美国是发达国家里唯一一个先是跌破更替生育率，后又反弹超出的国家。
In Japan, for instance, birth rates fell below the replacement rate of 2.1 children per woman in the mid-1970s and have been particularly low in the past 15 years.
比如在日本七十年代中期，出生率降至相当于平均每个妇女生2.1个孩子以下，而且在过去的15年里一直明显的偏低。
the fertility rate of half the world is now 2.1 or less—the magic number that is consistent with a stable population and is usually called “the replacement rate of fertility”.
世界上一半的地区，生育率仅为2.1%，甚至更低。这一比率通常被称作“生育替代率”，标志着人口数量的稳定。
Fertility rates in many European nations and Japan have dropped below the replacement rate, causing concern that shortages of labor and productivity could threaten the quality of life.
许多欧洲国家和日本的生育率已经下降到人口置换率以下，这让人们担心，劳动力短缺和生产力下降将威胁生活质量。
The American fertility rate is around the replacement rate of 2.1, compared with 1.4 for Germany and Italy, where populations are in decline.
美国的出生率为 2.1 ，很接近人口更替率，但是德国和意大利的出生率只有 1.4 ，也就说人口数量在下降。
In Japan, for instance, birth rates fell below the replacement rate of 2.1 children per woman in the mid1970s and have been particularly low in the past 15 years.
比如在日本七十年代中期，出生率降至相当于平均每个妇女生2.1个孩子以下，而且在过去的15年里一直明显的偏低。
In Japan, for instance, birth rates fell below the replacement rate of 2.1 children per woman in the mid1970s and have been particularly low in the past 15 years.
比如在日本七十年代中期，出生率降至相当于平均每个妇女生2.1个孩子以下，而且在过去的15年里一直明显的偏低。
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