英[ə'lɜːt]美[ə'lɜːrt]
记忆方法
词源词根法
和alarm一样，英语单词alert也是一个军事术语，来自意大利语all'erta（to the height），本意是“到高处去（瞭望警戒）”。erta指的是“高塔、瞭望塔”，源自拉丁语erigere（升起），同源的英语单词有erect（竖立）。all'erta进入法语后变为alerte，最后演变为英语alert。=alert[?'l??t]n警戒，警惕，警报adj.警惕的，警觉的vt.警告，使警觉
谐音记忆法
还可以谐音：讹了他，警惕的人不会被人讹了他。
adjective(形容词)noun(名词)verb(动词)
双解例句
adjective(形容词)noun(名词)verb(动词)
小知识
Alert! Alert! Alert! Did I get your attention? When you are alert, you are awake and ready. When you issue an alert you give warning, alerting people to, or notifying them of, a concern.
Alert is one of the rare words that can be used in the same form as a noun, verb, and adjective. In all parts of speech, alert implies preparedness. The word is derived from the French a l'erte which translates to “on the watch.” When you hear the word, imagine an alarm going off. The alarm is the alert. When you hear it, you have been alerted and you are now alert.
实用短语
常用短语
单词用法
词语辨析
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”。
词组短语
alert someone to sth使…警觉；使…警惕
on the alert提防；警戒著；随时准备著
red alert紧急警报，红色警报；应急状况
on the alert提防；警戒著；随时准备著
red alert紧急警报，红色警报；应急状况