red alert
Longman Dictionary of Contemporary English 5++LDOCE 5++ˌred aˈlert noun [countable usually singular, uncountable] WARNa warning that there is very great danger 紧急警报be (put/placed) on red alert All the hospitals are on red alert. 所有医院都处于紧急待命状态。
Examples from the Corpus
red alert• It was the normal state of red alert, panic, and disarray in the Bronx County Building.• The National Health Service was put on red alert.• Frank had to leave-he'd burnt so many bridges Blue Watch were on red alert.• If we bypass the decision we simply move into autopilot and the red alert comes into play.be (put/placed) on red alert• The National Health Service was put on red alert.• Perhaps that was why every cell of her normally controlled body seemed to be on red alert in Rune Christensen's presence.• Frank had to leave-he'd burnt so many bridges Blue Watch were on red alert.ˌred aˈlert nounChineseSyllable
very Corpus warning there that danger is a great
red alert
ˌred aˈlert
noun [countable usually singular, uncountable]
a warning that there is very great danger
be (put/placed) on red alert
All the hospitals are on red alert.
ˌred aˈlert
noun [countable usually singular, uncountable]a warning that there is very great danger
be (put/placed) on red alert