alert

alert汉语翻译：
a. 警觉的, 灵敏的, 留心的
n. 警报
vt. 使警觉, 通知, 使意识到
【法】警报, 警戒状态, 警戒期间
相关词组:
to alert sb to the danger of...
to alert sb to the fact that...
on the alert词型变化：
动词过去式:alerted过去分词:alerted现在分词:alerting第三人称单数:alerts英语解释：
名词 alert:

condition of heightened watchfulness or preparation for action同义词：qui vive

a warning serves to make you more alert to danger同义词：alerting

an automatic signal (usually a sound) warning of danger同义词：alarm, warning signal, alarum

动词 alert:

warn or arouse to a sense of danger or call to a state of preparedness同义词：alarm

形容词 alert:

very attentive or observant

mentally responsive

not unconscious; especially having become conscious同义词：awake

(usually followed by `to') showing acute awareness; mentally perceptive同义词：alive, awake

例句：

Troops are on the alert against any possible aggression.军队戒备着可能的来犯。

The alert leopard went up to a deer quietly.警觉的豹子静悄悄地走近一只鹿。

Although he's over eighty his mind is still remarkably alert.他虽已年过八十，但头脑仍然十分机敏。

An alert listener will have noticed the error.耳朵尖的人能听出这个错。