?英 [??l??t] 美 [??l??rt]

用法：

alert是一個(gè)名詞，表示戒、報(bào)的意思，也可以作動(dòng)詞，表示使覺或者發(fā)出報(bào)。

例句：

1. The police were on alert for any suspicious activity in the area.

對(duì)該地區(qū)的任何可疑活動(dòng)保持惕。

2. The alarm system will automatically alert the security company if there is a break-in.

如果有人闖入，報(bào)會(huì)自動(dòng)向保安公司發(fā)出報(bào)。

3. The doctor advised her to stay alert for any changes in her condition.

醫(yī)生建議她保持覺，留意身體狀況是否有變化。

4. The government issued an alert for potential flooding in low-lying areas.

發(fā)布了低洼地區(qū)可能發(fā)生洪水的預(yù)。

5. I'll set an alert on my phone to remind me of the meeting tomorrow.

我會(huì)在手機(jī)上設(shè)置提醒，提醒我明天的。

同義詞及用法：

1. Vigilant (adj.) - 惕的、機(jī)敏的

The security guards are always vigilant, ready to respond to any potential threats.

2. Alarm (n.) - 報(bào)

The fire alarm went off and we had to evacuate the building immediately.

3. Watchful (adj.) - 惕的、留心的

Be watchful of your surroundings when walking alone at night.

4. Wakeful (adj.) - 覺的、不眠不休的

The mother stayed wakeful all night, taking care of her sick child.

5. Caution (n.) - 謹(jǐn)慎、小心

He gave a word of caution to his colleagues before they embarked on the dangerous mission.

編輯總結(jié)：

alert是一個(gè)常用的詞匯，既可以作名詞也可以作動(dòng)詞，表示戒、報(bào)或者使覺。在日常生活中，我們經(jīng)常會(huì)遇到這個(gè)詞，比如在火災(zāi)、地震等緊急情況下，我們會(huì)聽到“alert”這個(gè)詞。除了作為名詞和動(dòng)詞外，alert還可以作形容詞，表示敏捷的、機(jī)敏的。在英語寫作和口語中，使用alert能夠讓句子更加生動(dòng)有力。因此，在學(xué)習(xí)英語的過程中，掌握好alert這個(gè)詞的用法非常重要。