alertness
警戒,機敏
A·lert·ness, n. The quality of being alert or on the alert; briskness; nimbleness; activity.
◄ ►
alertness
n 1: the process of paying close and continuous attention [syn: watchfulness,
vigilance]
2: a state of readiness to respond; "alerting was indicated by
the desynchronization of the EEG" [syn: alerting]
3: lively attentiveness [syn: on the qui vive]