i had a second thought about it
对某事产生疑虑；改变初衷
口语·表达犹豫或改变主意
英文释义
To reconsider or have doubts about a previous decision or opinion
例句
I was going to buy that car, but then I had a second thought about it and decided to wait.
典故来源
源于'second thought'这一短语，字面意思是'第二次想法'，指对原有决定重新思考，最早可追溯至19世纪的文学作品中。