4周搞定2000+托福核心词
去高处警戒→警惕
alert
常考释义
adj. 警觉的；警惕的；留神的
He had been spotted by an alert neighbour.
他已经被一个警觉的邻居发现了。
We must stay alert.
我们必须保持警惕。
They were both alert to the dangers.
他们两个都注意到了危险情况。
Max, stay alert. This could go to cult like that.
麦克斯，提高警惕。一不小心这就变邪教了。
来自《打工姐妹花 第4季第5集》
图片源自网络
n. 警报
One of the security guards gave the alert.
其中的一个保安发出了警报。
Officials raised the alert over a potential terrorist attack.
官员们对潜在的恐怖袭击发出了警报。
Well, I set up an alert on the credit card.
好吧，我在信用卡上设置了提醒。
来自《新飞跃比弗利 第5季第21集》
图片源自网络
adj. 敏捷的；活泼的
He was arrested by a couple of alert cops.
他被两个身手敏捷的警察逮捕了。
vt. 向…发出警报；使警惕；使注意
Greek officials admitted they were alerted before the attacks took place.
希腊官员承认在袭击发生前他们接到了警报。
A detector was able to alert the family of the danger.
探测器能够向家里人发出危险警报。
He wanted to alert people to the activities of the group.
他想提醒人们小心这个团体的活动。
vt. 向…报警；通知…待命；向…示意
He pressed the horn to alert the guards.
他按下喇叭，向卫兵示意。
A passerby alerted the police.
一个过路人报了警。
The fire brigade was alerted at 8.13pm.
消防队于晚8点13分接到报警。
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