They had enough money to live in comfort in their old age.

他们有足够的钱舒舒服服地安度晚年。

《牛津词典》

They worry about how they will support themselves in their old age.

他们担心自己到了晚年该如何来维持生计。

《柯林斯英汉双解大词典》

It means loving, respecting, obeying (服从), and taking care of one's parents in their old age.

这意味着爱护、尊重、服从和照顾他们年老的父母。

youdao

In fact,by age eighty-five, people are happier with their life than when they are eighteen years old.

VOA: special.2010.08.03

They may have worked all their lives, but for one reason or another, many Americans have ended up in old age struggling to make ends meet.

VOA: standard.2009.09.05

Rather they look on lots of children as a means of helping them in their old age.

BBC: Zambia's growing population

Still others argue that people ought to have children so there will be someone to care for them in their old age.

NEWYORKER: The Case Against Kids

If ordinary Chinese knew that their health would be looked after in their old age, they would save less and spend more.

ECONOMIST: Resilient China