come to think of it
But after thinking about it carefully, I realized...
口语·非正式·表示突然想到或补充观点
英文释义
used to introduce a new thought or realization that was not previously considered
例句
Come to think of it, I left my keys on the kitchen table before we left the house.
典故来源
源自日常对话中突然想起某事时的表达，强调思考后产生的意外或补充性认识。