keep one's head   (TTS發音)

keep calm during some emergency （在緊急情況下）保持鎮靜

    That housewife kept her head and telephoned the fire department immediately；otherwise the whole house might burn down. 那個家庭主婦頭腦冷靜，並且立即給消防隊打電話，否則整個房子就會燒光了。

    Above all，keep your head in the face of danger. 最主要的是，面臨危險要鎮靜。

    When Jim heard the fire alarm he kept his head and looked for the nearest exit. 當吉姆聽到火警鈴聲時，他保持鎮定，尋找最近的出口。