It is a real pleasure to be here to open the third meeting of our forum and to be welcoming such a distinguished and influential group of people from both our countries, many of whom are now old friends.

【翻译】我们十分高兴，能在这里召开第三次论坛会议，并且迎接来自我们两国的一批杰出的和有影响力的人物，他们中的许多人都是老朋友。

【分析】

主句：It is a real pleasure to be here to open the third meeting of our forum and to be welcoming such a distinguished and influential group of people from both our countries,

定语从句：many of whom are now old friends.

在主句中，to be here to open the third meeting of our forum and to be welcoming such a distinguished and influential group of people from both our countries是真正主语，It是形式主语。

【跟踪解答】

1. to be here to open the third meeting of our forum 和to be welcoming such a distinguished and influential group of people from both our countries 是两个并列的不定式。

2. 第一个不定式中，to be here“在这里”，to open the third meeting of our forum “召开第三次论坛会议”是目的状语；

3. 第二个不定式，to be welcoming such a distinguished and influential group of people from both our countries，“欢迎/迎接来自我们两国的一批杰出的和有影响力的人物”， a distinguished and influential group of people“一批杰出的和有影响力的人物”， from both our countries，“来自我们两国”。a group of people ”一批人”，把distinguished and influential 这两个形容词定语放在group之前，放在people之前也可，意思不变。