alert
- adj.警惕的;警觉的;戒备的;注意到;意识到
- vt.使警惕;使警觉;使戒备;向…报警;使认识到;使意识到
- n.警报;警戒;警惕;戒备
复数： alerts 派生词： alertly adj.;alertness n. 过去式： alerted 现在分词： alerting 过去分词： alerted 第三人称单数： alerts
alertadj.
警觉的；警惕的；戒备的
able to think quickly; quick to notice things
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。
意识到；注意到
aware of sth, especially a problem or danger
We must be alert to the possibility of danger.
我们必须认识到危险的可能性。
verb
向…报警；使警觉；使警惕；使戒备
to warn sb about a dangerous or urgent situation
Neighbours quickly alerted the emergency services.
邻居很快向紧急情况服务部门报了警。
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。
使意识到；使认识到
to make sb aware of sth
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。
noun
警戒；戒备；警惕
a situation in which people are watching for danger and ready to deal with it
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。
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。
警报
a warning of danger or of a problem
a bomb/fire alert
炸弹 / 火警警报
alert
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1
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.We all have to stay alert...
我们大家都必须保持警惕。
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The drug improved mental alertness.
该药有助于提神。
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3
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.The bank is alert to the danger.
银行充分意识到了危险。
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4
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.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。
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5
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.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。
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6
See also:red alert -
7
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.Soldiers and police have been put on alert.
士兵和警方都已进入警戒状态。
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8
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.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。
noun
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1
- an automatic signal (usually a sound) warning of danger
- Synonym: alarm warning signal alarum
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2
- a warning serves to make you more alert to danger
- Synonym: alerting
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3
- condition of heightened watchfulness or preparation for action
- bombers were put on alert during the crisis
- Synonym: qui vive
verb
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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
- Synonym: alarm
adj
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1
- engaged in or accustomed to close observation
- 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
- Synonym: watchful
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2
- mentally perceptive and responsive;an alert mind"
- 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
- Synonym: alive(p) awake(p)
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3
- quick and energetic
- a brisk walk in the park
- a lively gait
- a merry chase
- traveling at a rattling rate
- a snappy pace
- a spanking breeze
- Synonym: brisk lively merry rattling snappy spanking zippy
数据来源：WordNet
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I managed to walk around unchallenged for 10 minutes before an alert nurse spotted me .
我四处走动了10分钟，没有受到查问，之后一位警觉的护士发现了我。
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He had been spotted by an alert neighbour .
一个警觉的邻居发现了他。
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Following the bomb blast , local hospitals have been put on red alert .
炸弹爆炸之后，当地医院一直处于戒备状态。
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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。
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The security alert brought the airport to a standstill .
安全警戒使机场陷入停顿状态。
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Her whole bearing was alert .
她整个人保持着戒备状态。
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More than 5 000 troops have been placed on alert .
5000多名士兵已处于戒备状态。
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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。
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The attack was unsuccessful and served only to alert the enemy .
进攻未奏效，反而使敌人警觉起来。
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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。
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The baby is very mentally alert .
这孩子脑子很机灵。
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Her expression was watchful and alert .
她露出一副察言观色、处处提防的表情。
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The stamp of hoofs alerted Isabel .
马蹄声引起了伊莎贝尔的警觉。
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The coastguard was alerted .
海岸警卫队已接到报警。
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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。
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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。
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Soldiers and police have been put on alert .
士兵和警方都已进入警戒状态。
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The all clear was sounded about 10 minutes after the alert was given .
警报发出10分钟后又响起解除的信号。
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The bank is alert to the danger .
银行充分意识到了危险。
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The armed forces were on high alert to guard against any retaliation .
武装部队保持高度戒备，以防发生任何报复行动。
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I was hoping he 'd alert the police .
我当时希望他会报警。
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Neighbours heard the sound of rifle fire and alerted the police .
邻居们听到了步枪声，就报了警。
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Sirens sounded an end to the red alert .
警报声宣告了红色预警的结束。
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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。
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We all have to stay alert
我们大家都必须保持警惕。
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If our environment cools , then messages from the skin alert the body 's thermostat .
如果外在环境变冷，体表会将这一信息传递给身体的体温调节中枢。
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All the Plymouth hospitals are on red alert
普利茅斯所有的医院都处于紧急状态之中。
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Bedrooms are fitted with alarm pull cords to alert the manager in an emergency .
卧室中装有警报器拉绳，遇到紧急情况时可向经理报警。
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There were 15 minutes between the first air raid alert and the sounding of the all-clear signal .
第一次空袭警报和空袭警报解除信号之间间隔了15分钟。
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Troops in the Philippines have been put on full alert in anticipation of trouble during a planned general strike .
因料到在有组织的大罢工期间可能会出现骚乱，菲律宾的军队已进入全面戒备状态。
主要用于祈使句，通常后接介词 of。
Beware of the snake!
当心蛇！
You should beware of making hasty decisions.
作决定应谨防仓促草率。
指提醒某人对某事物引起重视，常用于 alert sb to sth 结构。
She alerted her husband to the dangers of drinking.
她提醒丈夫注意喝酒的种种危害。
We often alert the public to the need for pollution control.
我们经常提醒公众注意控制污染的必要性。