alert

复数：alerts过去式：alerted过去分词：alerted现在分词：alerting第三人称单数：alerts

1. 警惕的,警觉的,注意的 watchful and ready to deal with danger
2. 机灵的,敏捷的 quick to see and act

1. vt. 使处于戒备状态; 警告 make sb watchful and ready for possible danger

1. [C][S]警戒；戒备；警惕 a situation in which people are watching for danger and ready to deal with it
2. [C]警报 a warning of danger or of a problem

• alert mind反应敏捷的头脑
• alert movements敏捷的动作

• alert mentally思想上警惕

• alert in answering questions留心回答问题
• alert to随时注意
• alert to every sound and movement对任何响动都很警觉

• alert the public提醒公众

• alert amazingly吃惊地警告
• alert cautiously小心地警告
• alert extremely完全地警告
• alert guardedly谨慎地警告
• alert resolutely绝对地警告
• alert sharply尖锐地警告
• alert wisely聪明地警告

• alert to the danger提醒注意其危险性
• alert to the need提醒注意其必要性

• call an alert发出警报
• sound the alert拉响警报
• call off an alert取消警戒状态
• go on alert进入戒备

• 24-hour alert昼夜警戒
• active alert战斗警报
• blue alert空袭警报
• false alert假警报
• full alert全面戒备状态
• general alert全面警戒
• No 1 alert一级战备
• preliminary alert预备警报
• red alert紧急警报
• white alert解除警报
• yellow alert预备警报

• air alert空袭警报
• ground alert地面待战
• malfunction alert故障报警
• nuclear alert核警报

• during an alert在警戒期间
• in state of alert处于警戒状态

• the alert against any possible aggression警惕任何可能的侵略
• the alert for any indications of battle注意任何战事的迹象

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

1. The alert leopard went up to a deer quietly.
   警觉的豹子静悄悄地走近一只鹿。
2. 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。

1. I must alert him to the need to solve the problem.
   我必须使他认识到解决这问题的必要性。
2. But we must remain on the alert.
   但是我们现在仍然要保持警惕。
3. He decided he would stay more alert from now on.
   他决定从现在起要更提高警惕了。

1. Troops are on the alert against any possible aggression.
   军队戒备着可能的来犯。
2. One should not run about aimlessly during an alert.
   空袭警报期间不可到处乱跑。