中间商

例句：

1. 1. The middleman negotiateda favorable deal for both parties.
   中间商为双方协商了一个有利的交易。
2. 2. He wasthe middleman who facilitated the tradebetween the two countries.
   他是促成两国贸易的中间人。
3. 3. The middleman'srole is crucial in ensuring smooth transactions.
   中间人的重要作用在于确保交易顺利进行。