the quality of being very good, accurate, and showing an ability to notice very small differences

He is remembered for the acuteness of his intellect. 他因其敏锐的才智而被人们铭记。

He was distinguished by the liveliness of his conversation and the acuteness of his understanding. 他的特点是说话生动，悟性敏锐。

the fact of being very serious or severe

The choice of drug depends upon the severity, acuteness and cause of the pain. 对药物的选择取决于疼痛的严重程度、尖锐程度和原因。

You will have to deal with crises of varying acuteness. 你将不得不处理不同程度的危机。