Idiom · CEFR B2
open book
idiom
一目了然的事；坦诚直率的人
- 1.
something or someone that is easy to understand or whose thoughts and feelings are readily apparent
一目了然的事；坦诚直率的人
一目了然的事；坦诚直率的人
In use
Her face is an open book; you can always tell what she's feeling.
Dictionary facts from AI_SUPPLEMENT.