keep your head
US /kiːp jʊər hɛd/
UK /kiːp jʊər hɛd/

1.
冷静を保つ, 落ち着く
to remain calm in a difficult or stressful situation
:
•
It's important to keep your head during a crisis.
危機の間は冷静を保つことが重要です。
•
Even when everything went wrong, she managed to keep her head.
すべてがうまくいかなかったときでも、彼女は冷静を保つことができました。