put your finger on something
成語所屬單字finger
put your finger on something — 慣用語
1. To be able to identify or name exactly what the problem or the cause of a situat
1.慣用語
釋義
確切指出（問題或原因）
To be able to identify or name exactly what the problem or the cause of a situation is.
例句
There is something strange about this room, but I cannot put my finger on what it is.
The technician finally put her finger on the reason the computer kept shutting down.