simmer down
phrasal verb with simmer verb uk/ˈsɪm.ər/ us/ˈsɪm.ɚ/
informal
(怒火或激动的情绪)平息,冷静下来,平静下来
to become less angry or excited about something
Come on kids! Simmer down and get on with your work! 快点儿,孩子们!安静下来开始做功课!
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