alertness
noun [ U ] uk/əˈlɜːt.nəs/ us/əˈlɝːt.nəs/
警觉; 清醒; 机警
the state of being ready to see, understand, and act in a particular situation
One study found that the strongest factor influencing driver alertness was the time of day. 一项研究发现，影响驾驶员警觉性的最强因素是一天中的时间段。
I think a short nap works better than coffee to restore mental alertness. 我认为小睡片刻比喝咖啡更能恢复精神警觉。
See: alert
- More examples
- Exercise improves children's mental alertness and academic performance.
- She has the particular alertness of a good mother and a good business person.
- It is alertness to detail that gives his writing its edge.