| 单词 | alert |
| 释义 | alert nounadjective | verb + alert | alert + verb | preposition | phrases adjective➤heightened, high高度戒备状态◆the country has put its troops on high alert.该国部队处于高度戒备状态。➤full全面戒备状态➤amber, orange, red, yellow黄色戒备等级；橙色戒备等级；红色戒备等级◆his sudden disappearance triggered a red alert among his friends.他的突然失踪让朋友们都紧张起来。➤nationwide全国范围的紧急戒备状态▸➤bomb, fire, flood, pollution, security, terror轰炸／火灾／洪水／污染／安全／恐怖警报◆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。➤email电子邮件警报◆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。verb + alert➤issue, put out, raise, sound发出警报；拉响警报◆they rang the bells to sound the alert.他们敲响了钟，发出警报。➤spark, trigger触发／引发警报▸➤call off解除警报◆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。alert + verb➤go out警报发布◆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。preposition➤on the alert戒备着；防备着▸➤alert for密切注意⋯◆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。phrases➤be on full alert处于全面警戒状态◆the security forces are now on full alert.安全部队现在处于全面警戒状态。➤place sb on alert, put sb on alert使某人处于戒备状态◆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。➤keep sb on alert使某人保持戒备状态➤a state of alert戒备状态◆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。alert adjectiveverbs | adverb | preposition verbs➤be, look, seem警觉；看上去很警觉；好像很警惕▸➤become变得警觉▸➤remain, stay保持警觉▸➤keep sb使某人保持警觉◆the machine should help to keep the pilot alert.机器会帮助飞行员保持警觉。adverb➤extremely, fairly, very, etc.极其／相当／非常警惕▸➤fully完全警觉▸➤immediately, instantly, suddenly立刻／立即／突然警觉起来◆there was a noise outside and he was suddenly alert.外面有声响，他突然警觉起来。➤always, constantly总是很警觉；始终保持警惕▸➤mentally机警◆he was as mentally alert as a man half his age.他像年龄小他一半的人一样机警。preposition➤to对⋯保持警惕◆climbers need to be alert to possible dangers.登山者需要对可能存在的危险保持警惕。 alert /əlɜːt; name əlɜːrt/ [transitive] to tell sb about a dangerous or urgent situation so that they can do sth about it向⋯报警；使警惕；使戒备◆neighbours quickly alerted the emergency services.邻居们很快向应急部门报了警。◆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。 ➡ see also alert → watch noun alert /əlɜːt; name əlɜːrt/ [countable] an official warning to people to be prepared to deal with sth dangerous or difficult（官方发出的）警报◆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。◆a bomb alert炸弹警报 ➡ see also alert → watch noun alert /əlɜːt; name əlɜːrt/ [uncountable, singular] a situation in which people are watching for danger or an emergency and ready to deal with it警戒；警备；警惕◆police are warning the public to be on the alert for suspicious packages.警方警告公众要提防可疑包裹。◆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。◆following the bomb blast, local hospitals have been put on red alert.爆炸发生之后，当地医院已处于红色警备状态。 ➡ see also alert → warning noun , alert → warn verb , alert to sth → aware alert¹/əˈlɜ:t ||; əˈlɝt/adj alert (to sth) watching, listening, etc for sth with all your attention 留心的；留神的；警觉的: ◇security guards must be alert at all times. 保安人员必须时刻保持警惕。◇to be alert to possible changes 留意可能出现的变化 alert²/əˈlɜ:t ||; əˈlɝt/noun [c] a warning of possible danger 警报: ◇a bomb alert 炸弹警报 on the alert (for sth) ready or prepared for danger or an attack 警惕；戒备 alert³/əˈlɜ:t ||; əˈlɝt/verb [t] alert sb (to sth) to warn sb of danger or a problem 警告；提醒 alertsee ⇨ warn 1 ⇨ watch 7 • • •• ⇨ be on full alert• ⇨ be on the alert☞ alert¹☞ alert²☞ alert³ |
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