这项研究还对拥有亲生子女就有了晚年幸福保证（也就是想当然地认为子女会在你老了以后照顾你）的观念提出了质疑。
The study also calls into question the notion that having biological children - who presumably might be expected to take care of you in old age - is a ticket to well-being in your golden years.
他曾为皇帝效力，老了以后，他就可以退休回乡，安度晚年。
He had worked for the emperor and when he got old, he could go to his hometown to relax.
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