Hammer out是一个动词短语，意为通过争论或讨论，最后达成某项协议或解决方法。可以说hammer sth out ，也可以在hammer out后接名词。容易见到的搭配有hammer out a deal/agreement，表示敲定一笔买卖或达成一项协议。
例句
It might be complicated, but both our companies want to work together, so why dont we meet and try to hammer out a deal?
这或许会非常复杂，但大家双方公司都期望为之努力、并肩工作，所以大伙何不开会讨论，试着达成买卖呢？
After five years, we finally managed to hammer out an agreement with the insurance company.
大家终于在五年后和保险公司达成了协议。
The customers were relieved when the two mobile operators hammered out a new agreement to cut roaming charges.
客户们听说两家移动运营商就降低漫游费的问题达成了新的协定后，终于松了一口气。
