| 释义 |
on the alert
a·lert A0190000 (ə-lûrt′)adj.1. Vigilantly attentive; watchful: alert to danger; an alert bank guard. See Synonyms at careful.2. Mentally responsive and perceptive; quick.3. Brisk or lively in action: the bird's alert hopping from branch to branch.n.1. A signal that warns of attack or danger: Sirens sounded the alert for an air raid.2. A condition or period of heightened watchfulness or preparation for action: Nuclear-armed bombers were put on alert during the crisis.tr.v. a·lert·ed, a·lert·ing, a·lerts To notify of approaching danger or action; warn: a flashing red light that alerted motorists to trouble ahead.Idiom: on the alert Watchful and prepared for danger, emergency, or opportunity: bird watchers on the alert for a rare species.
[French alerte, from Italian all' erta, on the lookout : alla, to the, on the (from Latin ad illam, to that : ad, to; see ad- + illam, feminine accusative sing. of ille, that, the; see al- in Indo-European roots) + erta, lookout (from past participle of ergere, to raise, from Latin ērigere; see erect).]
a·lert′ly adv.a·lert′ness n.Translationsalert (əˈləːt) adjective1. quick-thinking. She's very old but still very alert. 思考靈敏的 机灵的2. (with to) watchful and aware. You must be alert to danger. 機警的 警觉的 noun a signal to be ready for action. 警報 警报 verb to make (someone) alert; to warn. The sound of gunfire alerted us to our danger. 使警覺 使警觉aˈlertly adverb 警覺地 警觉地aˈlertness noun 警覺 警觉on the alert on the watch (for). We were on the alert for any sound that might tell us where he was. 保持警覺 警觉着on the alert
on the alertParticularly watchful, attentive, or prepared (for something). Security personnel are on the alert for anyone carrying suspicious-looking packages or behaving strangely. We've been on the alert ever since we heard there had been a string of burglaries in our part of town.See also: alert, onon the alert (for someone or something)watchful and attentive for someone or something. Be on the alert for pickpockets. You should be on the alert when you cross the street in heavy traffic.See also: alert, onon the alertWatchful, fully prepared, as in The inspectors are always on the alert for a manufacturing error. [Late 1700s] See also: alert, on on the alert Watchful and prepared for danger, emergency, or opportunity: bird watchers on the alert for a rare species.See also: alert, onEncyclopediaSeealert |