Since those who cannot breed are, evolutionarily speaking, dead already, natural selection does not usually design bodies that outlive their own fertility.
既然那些已经不能生育的人在进化论的意义上说，已经死亡了。自然选择通常不会设计出结束生育后仍然存活的生物。
They call for incentives to keep women at home to breed (though poor career prospects for mothers are a big factor behind a precipitous fall in the fertility rate).
他们呼吁拿出措施来鼓励家庭里的妇女生育(然而母亲们糟糕的职业前景正是生育率突然大幅下降的一个背后原因)。
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