alert

/əˈlɝt/

adj./v./n. 警覺的；警告；警報
- A cup of tea at midnight helps the night-shift nurse stay alert. 半夜一杯茶讓上夜班的護理師保持清醒警覺。

其他意思

adj. 警覺的

If you are alert, you are paying full attention to things around you and are able to deal with anything that might happen.
- We all have to stay alert
n. 警報

An alert is a situation in which people prepare themselves for something dangerous that might happen soon.
- Due to a security alert, this train will not be stopping at Oxford Circus.
v. 使警覺

If you alert someone to a situation, especially a dangerous or unpleasant situation, you tell them about it.
- He wanted to alert people to the activities of the group

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