Lord (only) knows (what, where, why, etc.)…

成語所屬單字know

Lord (only) knows (what, where, why, etc.)… — 慣用語

1. Used to say that you do not know the answer to something.

1.慣用語
釋義

天曉得

Used to say that you do not know the answer to something.

例句

Lord only knows where he left his keys.

Why did she say that? Lord knows!