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alert [ə'lə:t]    添加到生词本 复制网址
基本释义
  • n. 警惕,警戒,警报
    a. 警惕的,警觉的
    v. 警惕
    a.机智的，灵敏的
词形变化
  • 时　态：a·lert·ed, a·lert·ing, a·lerts
    名　词：a·lert'ness
    副　词：a·lert'ly
常用短语
    1. air alert
      n.空袭警报
    2. on the alert
      保持警惕,处于戒备,提防着
    3. red alert
      n.紧急警报 红色警戒,一个著名游戏的名称
参考例句
    1. Mentally alert and sharp; keen.
      机智的头脑机灵和敏锐的;敏捷的
    2. The alert listener will have noticed the error.
      耳朵尖的人能听出这个错.
    3. An alert or watchful person; a guardian.
      机警的或警惕的人;守卫者。
    4. Alert and watchful;cautious.
      谨慎的警觉且戒备的;谨慎的
    5. The policemen were on the alert for an excaped convict.
      一名逃脱犯令警方全面警戒。
英英解释

  • 　1个动词解释

    1. warn or arouse to a sense of danger or call to a state of preparedness
      [同] alarm, alert
      [例]
      • The empty house alarmed him
      • We alerted the new neighbors to the high rate of burglaries

    　3个名词解释

    1. condition of heightened watchfulness or preparation for action
      [同] alert, qui vive
      [例]
      • bombers were put on alert during the crisis
    2. a warning serves to make you more alert to danger
      [同] alert, alerting
      3. show all ... ( 3 )

    　4个形容词解释

    1. very attentive or observant
      [反] unalert
      [例]
      • an alert and responsive baby is a joy
      • caught by a couple of alert cops
      • alert enough to spot the opportunity when it came
      • constantly alert and vigilant, like a sentinel on duty
    2. mentally responsive
      [例]
      • an alert mind
      3. show all ... ( 4 )