n.尖锐；敏锐；激烈
His mental acuity parallels his physical dominance. 他的精神和体质一样令人敬佩。
Loss of visual acuity and eye contact is generally accepted as visible indicators of alcohol-induced intoxication. 丧失视觉敏锐性和目光接触通常可以被看作是醉酒的特征。
n.(想象力等)贫乏；无聊；空白
