hammer out
phrasal verbhammer out something
to discuss a plan, an idea, etc. until everyone agrees or a decision is made 反复讨论出（一致意见）；充分研讨出（决定） to hammer out a compromise 反复讨论达成妥协
to play a tune, especially on a piano, loudly and not very well （在钢琴等上）敲打出