alert

英 [ə'lɜːt] 美 [ə'lɜːrt]

• adj. 警觉的；灵敏的
• vt. 使意识到；警惕
• n. 警戒；警报

双解释义

adj. (形容词)

1. 警惕的,警觉的,注意的

   watchful and ready to deal with danger

2. 机灵的,敏捷的

   quick to see and act

v. (动词)

1. vt. 使处于戒备状态; 警告

   make sb watchful and ready for possible danger

n. (名词)

1. [C][S]警戒；戒备；警惕

   a situation in which people are watching for danger and ready to deal with it

2. [C]警报

   a warning of danger or of a problem

详尽释义

adj. 形容词

1. 警觉的，警惕的
2. 留神的
3. 机敏的，机灵的，灵活的，机警的，灵敏的
4. 精神抖擞的
5. 细心的
6. 活跃的

n. 名词

1. 警戒期间，警戒期间，警报发出后，部队待机出动的时间
2. 警戒，警报，警惕，戒备
3. 警戒状态
4. 【军】紧急待命，战备，待命行动
5. 发警报
6. 报警信号
7. “警戒”（英国制造的巡逻艇）

v. 动词

1. 使警觉， 使警戒，（使）警惕，使戒备，使（某人）保持警觉
2. 使注意，提醒，使...意识到， 使认识到，提醒（某人）注意
3. 通知待命，通知，通报
4. 向…报警，向…发出警报
5. 告诉
6. 发出警告，命令警戒
7. 清醒

英英释义

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

Adjective:

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"
   

2. 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"
   

3. 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"
   

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"
   

例句

用作形容词 (adj.)

1. The alert leopard went up to a deer quietly.
   警觉的豹子静悄悄地走近一只鹿。
2. Although he's over eighty his mind is still remarkably alert.
   他虽已年过八十，但头脑仍然十分机敏。

用作及物动词 (vt.)

1. I must alert him to the need to solve the problem.
   我必须使他认识到解决这问题的必要性。
2. But we must remain on the alert.
   但是我们现在仍然要保持警惕。
3. He decided he would stay more alert from now on.
   他决定从现在起要更提高警惕了。

用作名词 (n.)

1. Troops are on the alert against any possible aggression.
   军队戒备着可能的来犯。
2. One should not run about aimlessly during an alert.
   空袭警报期间不可到处乱跑。

常见句型

用作形容词 (adj.)

用作定语

～+ n.

1. He has an alert mind.
   他很机灵。
2. The alert listener will have noticed the error.
   耳朵尖的人能听出这个错。

n. +～

1. He is a man alert in problem.
   他是个留意问题的人。

用作表语

S+be+～

1. Our guerrillas suddenly became alert as the dogs barked.
   狗叫了,我们的游击队员突然警觉起来。
2. 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。

S+be+～+ prep. -phrase

1. Be alert for any sign of change in the patient.
   对这个病人的病情变化要密切注意。
2. The student is alert in answering the question.
   这个学生回答问题小心谨慎。
3. A monkey is very alert in its movements.
   猴子的动作很敏捷。
4. He is always alert to danger.
   他对危险时刻保持警惕。
5. She was alert to seizing an opportunity.
   她机敏地抓住一个机遇。

S+be+～+(that-)clause

1. So alert she was that not a single error in the report slipped her.
   她十分警觉,所以报告中没有一个错能逃过她的眼睛。

用作动词 (v.)

用作及物动词

S+ ～+n./pron.

1. The voice of the caller alerted her.
   呼唤者的声音使她警觉起来。
2. Sirens alerted the cities long before the enemy bombers arrived.
   敌军轰炸机凌空以前,各城市早已鸣了警报。
3. They alert the public to the need for pollution control.
   他们提醒公众注意控制污染的必要性。
4. He had phoned the nearby villages, alerting them to the possibility of forest fires.
   他给附近几个村庄打了电话,叫人们注意森林可能起火。
1
5. The guard was alerted by a man climbing towards him.
   有一个人向卫兵爬过来,使卫兵警惕起来。

用作双宾动词

S+～+ n./pron. +that-clause

1. The boss alerted the guard that thief might come out at night.
   老板要警卫提防夜里可能有贼。
2. The villagers alerted the traveller that wolves might come out in the night.
   村民们叫旅行者提防,夜晚有狼群出没。

用作宾补动词

S+～+ n./pron. +to- v

1. The radio alerted coastal residents to prepare for the hurricane.
   电台警告沿海居民做好预防飓风的准备。
2. We will alert operating personnel to repair.
   我们将通知操作人员去维修。

其他

1. There are hurricane warning systems for alerting island residents.
   现在有了向岛上居民发出飓风警报的警报系统。

用作名词 (n.)

1. A national police alert was in effect.
   全国警察实行戒备。
2. The hurricane alert is over.
   飓风警报解除了。
3. The air-raid alert sounded at noon.
   正午时响起了空袭警报。
4. We'd just boarded the bus when the alert sounded.
   我们刚登上公共汽车，警报就响了。
5. If there is an alert, don't panic, just make your way to the exit.
   如果有警报，不要惊慌，只要走向太平门就行了。
6. The machine sounded the alert.
   机器发出了警报。
7. They received the alert at midnight.
   他们在午夜接到警报。
8. It's the alert signal.
   这是警报信号。
9. They were quiet during the alert.
   警戒期间他们很安静。
10. We should not run about aimlessly during an alert.
    警戒期间不可到处乱跑。
11. The whole country is in a state of alert.
    全国正处于戒备状态。
12. Security forces are on a high state of alert because of the President's visit.
    由于总统来访，保安部门处于高度警戒状态。
13. Sirens brought the whole street to the alert .
    警报声使整条街道进入戒备状态。

常用短语

用作名词 (n.)

on alert

警戒着，防备着 ready to take action to deal with a dangerous situation

on the alert

密切注意着，随时准备着paying attention to what is happening and ready to react quickly if necessary

词汇搭配

用作形容词 (adj.)

～+名词

• alert mind 反应敏捷的头脑
• alert movements 敏捷的动作

～+副词

• alert mentally 思想上警惕

～+介词

• alert in answering questions 留心回答问题
• alert to 随时注意
• alert to every sound and movement 对任何响动都很警觉

用作动词 (v.)

～+名词

• alert the public 提醒公众

～+副词

• alert amazingly 吃惊地警告
• alert cautiously 小心地警告
• alert extremely 完全地警告
• alert guardedly 谨慎地警告
• alert resolutely 绝对地警告
• alert sharply 尖锐地警告
• alert wisely 聪明地警告

～+介词

• alert to the danger 提醒注意其危险性
• alert to the need 提醒注意其必要性

用作名词 (n.)

动词+～

• call an alert 发出警报
• sound the alert 拉响警报
• call off an alert 取消警戒状态
• go on alert 进入戒备

形容词+～

• 24-hour alert 昼夜警戒
• active alert 战斗警报
• blue alert 空袭警报
• false alert 假警报
• full alert 全面戒备状态
• general alert 全面警戒
• No 1 alert 一级战备
• preliminary alert 预备警报
• red alert 紧急警报
• white alert 解除警报
• yellow alert 预备警报

名词+～

• air alert 空袭警报
• ground alert 地面待战
• malfunction alert 故障报警
• nuclear alert 核警报

介词+～

• during an alert 在警戒期间
• in state of alert 处于警戒状态

～+介词

• the alert against any possible aggression 警惕任何可能的侵略
• the alert for any indications of battle 注意任何战事的迹象

词语用法

1. 常用作定语形容词，如an alert man或his alert attention；
2. 作为动词时，alert的宾语后可接that从句。

   The villagers alerted the traveller that wolves might come out in the night.

adj. (形容词)

1. alert作形容词的基本意思是“警惕的,警觉的,注意的”,指特别留神以应付可能发生的事,尤指危险的事; 引申也可指“机灵的,敏捷的”,指思维敏捷,理解快,可用来形容人,也可用来形容物。
2. alert常用作表语,后接介词in或to,偶尔也可用作定语。

v. (动词)

1. alert的基本意思是指让某人对可能发生的危险或潜在的危险保持警觉或准备好迎击敌人,可译作“(向)…发出警告,使处于戒备状态”。
2. alert是及物动词,提醒、警觉或戒备的内容常由介词to引出,提醒作为准备的内容则由介词for引出。
3. alert也接双宾语,其直接宾语多为that引导的从句。alert还可接以动词不定式充当补足语的复合宾语。

词义辨析

n. (名词)

on alert,on the alert

• 这两个短语形似义近，其区别是：
• on alert是针对危险情况的，意思是“防备着”；on the alert是针对事态发展的，意思是“随时准备着”。

词源解说

• ☆ 17世纪进入英语，直接源自法语的alerte，意为vigilant；最初源自意大语的allerta，意为到高处。

近反义词

【近义词】

• active
• aware
• bright
• careful
• quick
• watchful
• alarm
• notify
• warning
• siren

【反义词】

• careless
• inactive
• slow
• unaware