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》

"Sharp" meant genuinely discerning, alert, acute rather than quick-witted or clever.

“Sharp”的意思是真正具有辨识力、警觉、敏锐，而不是机敏或聪明。

youdao

Anyway, everyone agrees that it was your quick-witted response in this emergency that has led to this satisfactory result.

不管怎么说，大家都认为：是你在紧急情况下的机智反应才有了目前这一良好的结果。

youdao

The police minister didn't help himself by arriving late to deliver his statement - an attempted point of order from a quick witted backbencher provided just enough cover to allow him to scramble into position as a puzzled and irate Speaker Bercow scanned the horizon.

BBC: Police minister Nick Herbert under pressure over bail

For the sharp-penned and quick-witted in those days the globe was there for trotting.

ECONOMIST: England, America and the politics of dissent

Though quick-witted on the stump, Mr McCain seems less intelligent and less eloquent than Mr Obama.

ECONOMIST: Introduction: The battle of hope and experience | The