英语词汇“blue alert”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	blue alert
释义	WordReference Random House Unabridged Dictionary of American English © 2024 blue′ alert′, Military(in military or civilian defense) an alert following the first, or yellow, alert, in which air attack seems probable. Cf. red alert, white alert, yellow alert.
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