| 单词 | alert |
| 释义 | alert adj., n., & v. --adj 1. watchful or vigilant; ready to take action. 2. nimble (esp. of mental faculties); attentive. --n 1. a warning call or alarm. 2. a warning of an air raid. b the duration of this. --vtr. (often foll. by to) make alert; warn (were alerted to the danger). Phrases and idioms on the alert on the lookout against danger or attack. Derivatives alertly adv. alertness n. Etymology: F alerte f. It. all' erta to the watch-tower |
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