中间人

例句：

1. 1.The middleman negotiated a fair price for both parties.
   中间人为双方协商了一个公平的价格。
2. 2. He was the middleman who helped facilitate the deal between the two companies.
   他是促成两家公司之间交易的中介人。
3. 3.The middleman made sure that all parties were satisfied with the outcome of the negotiations.
   中间人确保所有方对谈判结果都感到满意。