rack your brain(s)
成語所屬單字brain
rack your brain(s) — 慣用語
1. To think very hard or for a long time about something.
1.慣用語
釋義
絞盡腦汁
To think very hard or for a long time about something.
例句
Aiden racked his brain for a good birthday gift idea.
We racked our brains but couldn't solve the puzzle.