alert是什么意思？

alert

英[əˈlɜ:t] 美[əˈlɜ:rt]

• adj. 警觉的，警惕的，注意的，思维敏捷的，活泼的；
• n. 警报，警戒状态；
• vt. 向…报警；

复数：alerts;

过去式：alerted;

过去分词：alerted;

现在分词：alerting;

第三人称单数：alerts;

名词：alertness;

例句

• A sparrow is very alert in its movements. 麻雀行动非常机灵。
• A nationwide alert went out for three escaped prisoners. 全国范围内发布了警报，搜捕三名监狱逃犯。
• The whole navy was placed on full alert. 整个海军都处于全面戒备状态。
• A monkey is very alert in its movements. 猴子的动作很敏捷。
• He has an alert mind. 他很机灵。
• The rabbit seems to be very alert all its life. 兔子似乎一生都小心翼翼, 十分警觉。
• He is a man alert in problem. 他是个留意问题的人。
• Hearing this, I was instantly on the alert. 我一听这话, 当下就警惕起来.
• Drivers must be on the alert for traffic signals. 驾驶员必须密切注意交通信号.
• They were constantly on the alert not to be taken by surprise. 他们一直处于常备不懈状态以防突然袭击.

同义词

• adj.
  alert的同义词之：警觉的;机敏的
  nimble, ready, quick, vigilant, clear-witted, awake, job, the, lively, on, watchful, one's, prompt, wide, toes, attentive,
• alert的同义词之：其他释义
  ready, torpid, bright, job, brilliant, signal, cautious, lively, prompt, circumspect, dull, attentive, fresh, clever, nimble, smart, agile, on, slow, threaten, alive, caution, watchful, the, sharp, warn,

反义词

• adj.
  alert的反义词之：警觉的;机警的,机敏的;灵活的
  torpid, asleep, languid, supine, heedless, listless, sluggish, lethargic, slow, dull,
• alert的反义词之：其他释义
  drowsy,

词组

• on the alert
  Watchful and prepared for danger, emergency, or opportunity 警戒着，防备着：注意着且防备着危险、意外或机会

英语四级真题

More sleep in old age, however, is associated with better health, and most older people would feel better and more alert if they slept for longer periods, he said.
出自-2011年6月阅读原文

英语六级真题

And when that is failed, they stop the hunters, banging on pots and pans to alert the deer.
出自-2013年12月听力原文
To be alert to fluctuations in foreign markets.
出自-2011年12月阅读原文

柯林斯高阶英汉双解学习词典释义

• ADJ-GRADED
  警觉的；警惕的；留神的；机敏的
  If you are alert, you are paying full attention to things around you and are able to deal with anything that might happen.
  例句
  We all have to stay alert... 我们大家都必须保持警惕。 He had been spotted by an alert neighbour. 一个警觉的邻居发现了他。
• ADJ-GRADED
  充分意识到…的;完全感觉到…的
  If you are alert to something, you are fully aware of it.
  例句
  The bank is alert to the danger. 银行充分意识到了危险。
• N-COUNT
  警戒（状态）；戒备（状态）
  An alert is a situation in which people prepare themselves for something dangerous that might happen soon.
  例句
  Due to a security alert, this train will not be stopping at Oxford Circus. 由于安全戒备的原因，该次列车在“牛津街口广场”站将不停留。
• VERB
  向…报警；使警觉；使警惕；使注意
  If you alert someone to a situation, especially a dangerous or unpleasant situation, you tell them about it.
  例句
  He wanted to alert people to the activities of the group... 他想提醒人们小心该团体的活动。 I was hoping he'd alert the police. 我当时希望他会报警。
• PHRASE
  处于警戒状态;保持戒备
  If soldiers or police are on alert, they are ready to deal with anything that may happen.
  例句
  Soldiers and police have been put on alert. 士兵和警方都已进入警戒状态。
• PHRASE
  准备就绪；防备着
  If you are on the alert for something, you are ready to deal with it if it happens.
  例句
  They want to be on the alert for similar buying opportunities. 他们希望随时掌握有关类似购买机会的信息。

英汉词典释义

• adj.
  警惕的，警觉的，警戒的；留心的，留神的，注意的
  He is a man alert in problem. 他是个留意问题的人。 The rabbit seems to be very alert all its life. 兔子似乎一生都小心翼翼, 十分警觉。
  (思想)敏锐的，敏捷的；(行动)迅速的，(动作)灵敏的，灵活的，机灵的，活泼的
  He has an alert mind. 他很机灵。 A monkey is very alert in its movements. 猴子的动作很敏捷。
• vt.
  使(某人)保持警觉，使警惕，使戒备；使意识到，使认识到
  The voice of the caller alerted her. 呼唤者的声音使她警觉起来。
  提醒(某人)注意(某事)
  The boss alerted him that thief might come out at night. 老板要他提防夜里可能有贼。
• n.
  警戒，戒备，警惕，警报
  The whole navy was placed on full alert. 整个海军都处于全面戒备状态。

英英词典释义

• Noun
  1. condition of heightened watchfulness or preparation for action;
  "bombers were put on alert during the crisis"
  2. a warning serves to make you more alert to danger
  3. an automatic signal (usually a sound) warning of danger
• Verb
  1. warn or arouse to a sense of danger or call to a state of preparedness;
  "The empty house alarmed him""We alerted the new neighbors to the high rate of burglaries"
• Adjective
  1. very attentive or observant;
  "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;
  "an alert mind"
  3. not unconscious; especially having become conscious;
  "the patient is now awake and alert"
  4. (usually followed by `to') showing acute awareness; mentally perceptive;
  "alert to the problems""alive to what is going on""awake to the dangers of her situation""was now awake to the reality of his predicament"

行业词典

• 计算机： 警报，报警信号；