cool as a cucumber
非常冷静和自信
口语·形容非常冷静沉着
英文释义
Calm and composed, especially in stressful situations
例句
Even during the crisis, she remained cool as a cucumber.
典故来源
源自18世纪英国，黄瓜内部温度比环境低，比喻人在压力下保持冷静。