thrash [sth] out,
thresh [sth] out vtr 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 ） |