Definitions

[1] adj. 警觉的, 灵敏的, 留心的

[2] n. 警报

[3] vt. 使警觉, 通知, 使意识到

[4] [法] 警报, 警戒状态, 警戒期间

[ ә'lә:t ]

1. A tsunami is coming, so please be on the alert.
   海啸来了，密切注意啊。
2. The tsunami alert was cancelled.
   海啸的警报解除了。
3. You're very alert.
   你真是警惕。
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