a penny for your thoughts
US /ə ˈpen.i fɔːr jʊər θɔːts/
UK /ə ˈpen.i fɔːr jʊər θɔːts/

1.
你在想什麼, 請告訴我你的想法
a way of asking what someone is thinking, especially when they are quiet or seem preoccupied
:
•
You've been quiet for a while, a penny for your thoughts?
你安靜了一會兒,在想什麼呢?
•
She looked lost in thought, so I asked, 'A penny for your thoughts?'
她看起來若有所思,所以我問:「你在想什麼呢?」