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TOEFL BNC: 4966 COCA: 5318

alert

verb
 
/əˈlɜːt/
/əˈlɜːrt/
[often passive]
Verb Forms
present simple I / you / we / they alert
/əˈlɜːt/
/əˈlɜːrt/
he / she / it alerts
/əˈlɜːts/
/əˈlɜːrts/
past simple alerted
/əˈlɜːtɪd/
/əˈlɜːrtɪd/
past participle alerted
/əˈlɜːtɪd/
/əˈlɜːrtɪd/
-ing form alerting
/əˈlɜːtɪŋ/
/əˈlɜːrtɪŋ/
jump to other results
  1.  
    to warn somebody about a dangerous situation or one that requires immediate action向…报警；使警觉；使警惕；使戒备
    • alert somebody Neighbours quickly alerted the emergency services.邻居很快向应急服务机构报了警。
    • (be) alerted by something Alerted by a noise downstairs, he sat up and turned on the light.楼下的响声使他警觉，他坐起来打开灯。
    • be alerted that… The coastguard were alerted that a yacht had run into difficulties.海岸警卫队接到警报，一艘游艇遇到了困难。
    Topics Dangerc1, War and conflictc1
  2.  
    to make somebody aware of something使意识到；使认识到
    • be alerted to something They had been alerted to the possibility of further price rises.他们已意识到价格可能继续上涨。

alert

noun
 
/əˈlɜːt/
/əˈlɜːrt/
jump to other results
  1.  
    [singular, uncountable] a situation in which people are watching for danger and ready to deal with it警戒；戒备；警惕
    • on the alert (for something) Police are warning the public to be on the alert for suspicious packages.警方警告公众要警惕可疑包裹。
    • on alert More than 5 000 troops have been placed on (full) alert.5 000 多名士兵已处于（全面）戒备状态。
    Extra Examples
    • The army was yesterday placed on a state of alert in case of more riots.军队昨天处于戒备状态以防出现更多的暴乱。
    • Thousands of police were put on full alert at all main roads leading to the city.在通向该城市的所有主要道路上有特派的数千警察全面戒备。
    • You should always be on the alert for anyone who looks suspicious.你们应该时刻密切注意形迹可疑的人。
    Topics Dangerc1, War and conflictc1
    Oxford Collocations Dictionaryadjective
    • heightened
    • high
    • full
    • …
    verb + alert
    • issue
    • put out
    • raise
    • …
    alert + verb
    • go out
    preposition
    • on the alert
    • alert for
    phrases
    • be on full alert
    • place somebody on alert
    • put somebody on alert
    • …
    See full entry
  2.  
    [countable] a warning of danger or of a problem警报
    • a bomb/fire alert炸弹／火警警报
    Wordfinder
    see also bomb alert, red alert
    Extra Examples
    • A nationwide alert went out for three escaped prisoners.全国范围内发布了警报，搜捕 3 名越狱逃犯。
    • A security alert was issued after four men escaped from the prison.4 名罪犯越狱后，当局发出安全警报。
    • Receive regular email alerts about breaking news.定时接收有关爆炸式新闻的电子邮件提醒。
    • The alert was called off when it was found that the bomb was not live.发现炸弹未装炸药时，警报就解除了。
    • They rang the church bells to sound the alert and the villagers then fled.他们敲响教堂的钟来发出警报，村民随即逃走。
    • A bomb alert forced staff to evacuate the building for several hours.炸弹警报迫使工作人员撤离大楼几个小时。
    • A flood alert has been issued in the city after last night's heavy rain.昨夜暴雨过后，这个城市发出了洪水预警。
    Topics Dangerc1, War and conflictc1
    Oxford Collocations Dictionaryadjective
    • heightened
    • high
    • full
    • …
    verb + alert
    • issue
    • put out
    • raise
    • …
    alert + verb
    • go out
    preposition
    • on the alert
    • alert for
    phrases
    • be on full alert
    • place somebody on alert
    • put somebody on alert
    • …
    See full entry
    3. Word Originlate 16th cent. (originally in military use): from French alerte, from Italian all' erta ‘to the watchtower’.

alert

adjective
 
/əˈlɜːt/
/əˈlɜːrt/
jump to other results
  1.  
    able to think quickly; quick to notice things警觉的；警惕的；戒备的
    • Suddenly he found himself awake and fully alert.突然他发觉自己醒了过来，而且高度警觉。
    • Two alert scientists spotted the mistake.两个警觉的科学家发现了这个错误。
    • Try to stay alert while driving at night.晚上开车时尽量保持警惕。
    • an alert mind机警的头脑
    • mentally alert机警
    Extra Examples
    • The machine should help to keep the pilot alert.机器会帮助飞行员保持警觉。
    • There was a noise outside and he was suddenly alert.外面有声响，他突然警觉起来。
    Oxford Collocations Dictionaryverbs
    • be
    • look
    • seem
    • …
    adverb
    • extremely
    • fairly
    • very
    • …
    preposition
    • to
    See full entry
  2.  
    alert to something aware of something, especially a problem or danger意识到，注意到（问题或危险）
    • We must be alert to the possibility of danger.我们必须认识到危险发生的可能性。
    • She was alert to the slightest sound.她对最轻微的声音都很警觉。
    Topics Dangerc1
    Oxford Collocations Dictionaryverbs
    • be
    • look
    • seem
    • …
    adverb
    • extremely
    • fairly
    • very
    • …
    preposition
    • to
    See full entry
    3. Word Originlate 16th cent. (originally in military use): from French alerte, from Italian all' erta ‘to the watchtower’.
TOEFL BNC: 4966 COCA: 5318
alert

noun

ADJECTIVE | VERB + ALERT | ALERT + VERB | PREPOSITION | PHRASES ADJECTIVE➤heightened, high高度戒備狀態◇The country has put its troops on high alert.該國部隊處於高度戒備狀態。➤full全面戒備狀態➤amber, orange, red, yellow黃色戒備等級；橙色戒備等級；紅色戒備等級◇His sudden disappearance triggered a red alert among his friends.他的突然失踪讓朋友們都緊張起來。➤nationwide全國範圍的緊急戒備狀態▸➤bomb, fire, flood, pollution, security, terror轟炸／火災／洪水／污染／安全／恐怖警報◇A security alert was issued after four men escaped from the prison.4 名罪犯越獄後，當局發出安全警報。➤email電子郵件警報◇Receive regular email alerts about breaking news.定時接收有關爆炸式新聞的電子郵件提醒。VERB + ALERT➤issue, put out, raise, sound發出警報；拉響警報◇They rang the bells to sound the alert.他們敲響了鐘，發出警報。➤spark, trigger觸發／引發警報▸➤call off解除警報◇The alert was called off when it was found that the bomb was not live.發現炸彈未裝炸藥時，警報就解除了。ALERT + VERB➤go out警報發佈◇A nationwide alert went out for three escaped prisoners.全國範圍內發佈了警報，搜捕 3 名越獄逃犯。PREPOSITION➤on the alert戒備着；防備着▸➤alert for密切注意⋯◇You should always be on the alert for anyone who looks suspicious.你們應該時刻密切注意形跡可疑的人。PHRASES➤be on full alert處於全面警戒狀態◇The security forces are now on full alert.安全部隊現在處於全面警戒狀態。➤place sb on alert, put sb on alert使某人處於戒備狀態◇Thousands of police were put on full alert at all main roads leading to the city.在通向該城市的所有主要道路上有特派的數千警察全面戒備。➤keep sb on alert使某人保持戒備狀態➤a state of alert戒備狀態◇The army was yesterday placed on a state of alert in case of more riots.軍隊昨天處於戒備狀態以防出現更多的暴亂。
alert

adjective

VERBS | ADVERB | PREPOSITION VERBS➤be, look, seem警覺；看上去很警覺；好像很警惕▸➤become變得警覺▸➤remain, stay保持警覺▸➤keep sb使某人保持警覺◇The machine should help to keep the pilot alert.機器會幫助飛行員保持警覺。ADVERB➤extremely, fairly, very, etc.極其／相當／非常警惕▸➤fully完全警覺▸➤immediately, instantly, suddenly立刻／立即／突然警覺起來◇There was a noise outside and he was suddenly alert.外面有聲響，他突然警覺起來。➤always, constantly總是很警覺；始終保持警惕▸➤mentally機警◇He was as mentally alert as a man half his age.他像年齡小他一半的人一樣機警。PREPOSITION➤to對⋯保持警惕◇Climbers need to be alert to possible dangers.登山者需要對可能存在的危險保持警惕。
TOEFL BNC: 4966 COCA: 5318
alert verb
⇨ warnalert noun
⇨ warning (a bomb/fire alert) ⇨ on the alert ⇨ watch noun
TOEFL BNC: 4966 COCA: 5318
alert
Able to think clearly: alert, lucid, clear...
Attentiveness and paying attention: attention, regard, focused...
The ability to think clearly: clarity, objectivity, bandwidth...
To warn someone about or against something: warn, alert, tip off...
To tell someone something, or to give information: tell, deliver, report...
Warning and warnings: warning, notice, caution...

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