bolt from the blue
突然而来的惊喜或震惊的消息
口语·形容意外事件或消息
英文释义
an unexpected and surprising event or news
例句
The news of his resignation came as a bolt from the blue to all of us.
典故来源
源自自然现象,晴天突然出现的闪电,比喻完全出乎意料的事件。