quickness
n. 急速，迅速；尖锐化
例句
One person must prepare for it with the same tenacity and quickness as one does for a fencing tournament or a chess match.
一个人必须像参加击剑比赛或国际象棋比赛那样，以同样的坚韧和敏捷来准备。
She was known for the quickness of her wit.
她以头脑灵活见称。
《牛津词典》
He amazes me with his quickness and eagerness to learn.
他敏思好学，令我惊讶。
