Particioants or Audience 参会者或听众

My name is David Ho，I ’ m from Shanghai，China ﹒ There are a number of questions I ’ d like to ask ﹒.我向医师提一个问题，还有一点评论。我想问医师他说的是什么意思。请原谅，医师，我们能不能把最后一点更详细地讨沦一下？I ’ m delighted to meet you，Dr ﹒ Nickson ﹒ I ’ m so glad to meet you too ﹒.注:偶遇素不相识的陌生人,搭讪可用天气现象作话 ......