An agile mind; nimble wits.

机敏的头脑；聪明才智。

youdao

The boy had an agile mind, and could come up with excuses as quickly as his mother asked for them.

那男孩有机敏的头脑，当他母亲要求理由时，他马上就能想到。

youdao

She was quick-witted and had an extraordinarily agile mind.

她很机智并且有一个特别敏锐的头脑。

《柯林斯英汉双解大词典》

She was quick-witted and had an extraordinarily agile mind.

她很机智并且有一个特别敏锐的头脑。

《柯林斯英汉双解大词典》