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

1.
你在想什么, 请告诉我你的想法
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?
你安静了一会儿,在想什么呢?
•
She looked lost in thought, so I asked, 'A penny for your thoughts?'
她看起来若有所思,所以我问:“你在想什么呢?”