keep calm
US /kiːp kɑːm/
UK /kiːp kɑːm/

1.
保持冷靜, 保持鎮定
to remain relaxed and not get excited or worried
:
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No matter what happens, just keep calm and carry on.
無論發生什麼,只要保持冷靜,繼續前進。
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It's important to keep calm during an emergency.
在緊急情況下保持冷靜很重要。