| 单词 | alert |
| 释义 | adjectiveverbnounalertBrE /əˈlɜːt/ NAmE /əˈlɜːrt/ adjective 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。~to sth aware of sth , 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。▸ alert·ly BrE /əˈlɜːtli/ NAmE /əˈlɜːrtli/ adverb ▸ alert·ness BrE /əˈlɜːtnəs/ NAmE /əˈlɜːrtnəs/ noun [U ]alertBrE /əˈlɜːt/ NAmE /əˈlɜːrt/ verb present simple - I / you / we / they alert BrE /əˈlɜːt/ NAmE /əˈlɜːrt/ present simple - he / she / it alerts BrE /əˈlɜːts/ NAmE /əˈlɜːrts/ past simple alerted BrE /əˈlɜːtɪd/ NAmE /əˈlɜːrtɪd/ past participle alerted BrE /əˈlɜːtɪd/ NAmE /əˈlɜːrtɪd/ -ing form alerting BrE /əˈlɜːtɪŋ/ NAmE /əˈlɜːrtɪŋ/ [often passive ]~sb (to do sth ) | ~sb (that )… to warn sb about a dangerous or urgent situation 向…报警；使警觉；使警惕；使戒备◆ Neighbours quickly alerted the emergency services . 邻居很快向应急服务机构报了警。◆ 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。~sb to sth to make sb aware of sth 使意识到；使认识到◆ 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。alertBrE /əˈlɜːt/ NAmE /əˈlɜːrt/ noun [sing. , U ]a situation in which people are watching for danger and ready to deal with it 警戒；戒备；警惕◆ 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。[C ]a warning of danger or of a problem 警报◆ a bomb /fire alert 炸弹/火警警报alert , assassinate , attack , campaign , execute , extremist , hijack , hostage , kidnap , terrorism ➡ see also red alert |
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