1、He played the role of an introducer at the conference, welcoming all the participants and introducing the speakers.
他在会议上扮演了一个介绍人的角色，欢迎所有的参与者并为演讲者介绍。

2、The company relied on the introducer to bring in new clients and expand their business network.
公司依靠引进者来带来新的客户和扩展他们的业务网络。