not for nothing
成語所屬單字nothing
not for nothing — 慣用語
1. Used to emphasize that there is a good reason for something.
1.慣用語
釋義
並非毫無理由
Used to emphasize that there is a good reason for something.
例句
Not for nothing did she win the award; she worked hard.
He is called the expert, and not for nothing.