The word 'alert' is an adjective meaning watchful or quick-witted, a noun referring to a warning, and a verb meaning to warn.
单词 'alert' 是形容词，指警觉的或敏捷的；名词是警报；动词是报警。
| 单词 | alert |
|---|---|
| 音标 | [əˈlɜ:t] [əˈlɜ:rt] |
| 释义 | adj.["警觉的，警惕的，注意的","思维敏捷的","活泼的"] n.["警报","警戒状态"] vt.["向…报警"] |
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