词汇与表达：nimble-agile

nimble
nimble
灵活的;敏捷的;思路敏捷的;机敏的
Elderly people are told that if they want to keep their minds nimble, they must use them.
老年人被告知，要想保持头脑灵敏，就必须要多动脑。
His intellect and mental agility have never been in doubt.
他的才智和机敏从未受到怀疑。

agile:able to think quickly and in an intelligent