thrash [sth] out, thresh [sth] outvtr phrasal sepphrasal verb, transitive, separable: Verb with adverb(s) or preposition(s), having special meaning, divisible--for example, "call off" [=cancel], "call the game off," "call off the game."
informal, figurative (debate intensely)
通过讨论解决（问题） tōng guò tǎo lùn jiě jué （ wèn tí ）
Bob and Jane were determined to thrash out their marital problems. Congress has been thrashing it out for months.