1、In a dispute, it is often helpful to have an intermediator to facilitate communication between the two parties.
在争议中，有一个中介者帮助两方进行沟通往往是有帮助的。
2、The government appointed an intermediator to mediate the negotiation between the labor union and the company.
政府指派了一个调解人来调解工会和公司之间的谈判。