作为本届研讨会的主席，我十分高兴和荣幸地欢迎各位出席今天的大会。
As the chairperson of this symposium,I have the pleasure and honor of welcoming all of you to this international meeting.
欢迎各位参加……
May I welcome all o you to...
我代表……，对前来参加……的各位朋友表示热烈的欢迎
On behalf of...,I bid a warm welcome to you all gathered here to participatr...
首先，我对各位朋友的到来表示欢迎
May I begin by welcoming you to...
