中介费在英文中通常被称为"commission"，其来源可能源于古法语，它的意思是"费用"或"报酬"。例句如下：

The real estate agent charges a commission of 5% on the sale of the house.

（房地产中介收取5%的中介费。）

The broker receives a commission for every trade that is made through his platform.

（经纪人每次交易都会收到一笔佣金。）

The travel agency charges a commission for booking flights and hotels on behalf of their clients.

（旅行社为客户预订机票和酒店时收取中介费。）