thrash out
US /θræʃ aʊt/
UK /θræʃ aʊt/

1.
彻底讨论, 解决
to discuss a problem or issue thoroughly in order to find a solution or reach an agreement
:
•
Let's thrash out the details of the new project tomorrow.
我们明天来彻底讨论一下新项目的细节。
•
They need to thrash out their differences before the meeting.
他们需要在会议前解决分歧。