pick someone's brain
US /pɪk ˈsʌm.wʌnz breɪn/
UK /pɪk ˈsʌm.wʌnz breɪn/

1.
向某人请教, 咨询某人
to ask someone who knows a lot about a subject for information or their opinion
:
•
Can I pick your brain about your experience with starting a business?
我能向你请教一下你创业的经验吗?
•
I need to pick John's brain about the new software.
我需要向约翰请教关于新软件的问题。