你得做个介绍，因为我不知道她的名字。

You'll have to make the ___introduction since I don't know her name.

会议以所有参与者的正式介绍开始。

The meeting started with a formal ___introduction of all participants.

在社交活动上，她负责了两位重要客户之间的介绍。

At the networking event, she handled the ___introduction between two important clients.