alert是什么意思_alert怎么读_中英文释义(含例句用法)

engaged in or accustomed to close observation;"caught by a couple of alert cops"
"alert enough to spot the opportunity when it came"
"constantly alert and vigilant, like a sentinel on duty"

quick and energetic;"a brisk walk in the park"
"a lively gait"
"a merry chase"
"traveling at a rattling rate"
"a snappy pace"
"a spanking breeze"

mentally perceptive and responsive;"an alert mind"
"alert to the problems"
"alive to what is going on"
"awake to the dangers of her situation"
"was now awake to the reality of his predicament"

Verb:

warn or arouse to a sense of danger or call to a state of preparedness;"The empty house alarmed him"
"We alerted the new neighbors to the high rate of burglaries"

中英词源

alert 警醒的WWW.WenTIYi.Com

来自意大利语all’erta. -erta, 同 erect，竖直。即全部到城墙上守城。

alert: alert: [17] Alert comes, via French, from an Italian phrase all’ erta ‘on the look-out’, or literally ‘at 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.

词态变化

复数 alerts;
第三人称单数 alerts;
过去式 alerted;
过去分词 alerted;
现在分词 alerting;
名词 alertness;

权威造句

1. The armed forces were on high alert to guard against any retaliation.: 武装部队保持高度戒备，以防发生任何报复行动。

2. They want to be on the alert for similar buying opportunities.: 他们希望随时掌握有关类似购买机会的信息。

3. The bank is alert to the danger.: 银行充分意识到了危险。

4. All the Plymouth hospitals are on red alert.: 普利茅斯所有的医院都处于紧急状态之中。

5. Soldiers and police have been put on alert.: 士兵和警方都已进入警戒状态。

近反义词

adj.

active

aware

bright

careful

quick

watchful

alarm

notify

warning

siren

相似短语

on the alert 保持警惕,处于戒备,提防着

alert to vt.警告

be on the alert 注意提防警戒

alert frequency 【计】报警频率

alert pulse 醒时脉博

strip alert phr. 待命，国内防御飞机的戒备状态（待发状态）

orange alert 橙色预警

smog alert 烟雾警报

malfunction alert 故障报警器

alert box 告警框

单词分析

暂无,等待补充.

记忆方法