One of the problems of old age is that your memory can start to play tricks on you.

老年人的问题之一是记忆可能紊乱起来。

《牛津词典》

At the same time, dementia is already one of the most costly and devastating health problems of old age.

与此同时，痴呆已成为老年人最严重的健康问题之一。

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Just as there is less stigma attached to financial problems, so the rise of Social Security and Medicare has sharply reduced the financial uncertainty of old age.

ECONOMIST: The sorry state of saving

Ruth Anim, 27, from Kilburn, who has epilepsy, heart problems, severe autism and curvature of the spine, has the mental age of a 10-year-old.

BBC: London