know what you’re talking about
成語所屬單字know
know what you’re talking about — 慣用語
1. To have knowledge about something from personal experience.
1.慣用語
釋義
有經驗
To have knowledge about something from personal experience.
例句
I've been a teacher for 30 years, so I know what I'm talking about.
She knows what she's talking about when it comes to baking.