• vt. 警告；使警覺，使意識到
• adj. 警惕的，警覺的；留心的
• n. 警戒，警惕；警報(bào)
• n. (Alert)人名；(西)阿萊爾特

來自意大利語all’erta. -erta, 同 erect，豎直。即全部到城墻上守城。

alert

alert: [17] Alert comes, via French, from an Italian phrase all’ erta ‘on the look-out’, or literally ‘a(chǎn)t the (alla) watch-tower (erta)’. Erta was short for torre erta, literally ‘high tower’, in which the adjective erta ‘high’ came ultimately from Latin ērectus, the past participle of ērigere ‘raise’.
=> erect

alert (adv.)

"on the watch," 1590s, from French alerte "vigilant" (17c.), from phrase à l'erte "on the watch," from Italian all'erta "to the height," from erta "lookout, high tower," noun use of fem. of erto, past participle of ergere "raise up," from Latin erigere "raise" (see erect). The adjective is attested from 1610s, the noun from 1803, and the verb from 1868. Related: Alerted; alerting.

1. The armed forces were on high alert to guard against any retaliation.

武裝部隊(duì)保持高度戒備，以防發(fā)生任何報(bào)復(fù)行動(dòng)。

來自柯林斯例句

2. They want to be on the alert for similar buying opportunities.

他們希望隨時(shí)掌握有關(guān)類似購買機(jī)會(huì)的信息。

來自柯林斯例句

3. The bank is alert to the danger.

銀行充分意識到了危險(xiǎn)。

來自柯林斯例句

4. All the Plymouth hospitals are on red alert.

普利茅斯所有的醫(yī)院都處于緊急狀態(tài)之中。

來自柯林斯例句

5. Soldiers and police have been put on alert.

士兵和警方都已進(jìn)入警戒狀態(tài)。

來自柯林斯例句