Oh, my God, you really want me to be the keynote speaker?
我的天啊你真的要我当主讲人吗？
It is my home to introduce today's keynote speaker, Mr. Liu.
请允许我介绍今天的重要发言人，刘三斤先生。
It is my home to introduce today's keynote speaker, Mr. Black.
现在我们来介绍下此次会员的主要发言人，布莱克先生。
It is my honor to introduce today's keynote speaker, Mr. Black.
我很荣幸地向大家介绍我们今天主要发言人，布莱克先生。
The keynote speaker was ill so I had to make a speech off the cuff .
主旨演讲人病了，所以我不得不即兴发表了一篇演讲。
It is pleasure to introduce the keynote speaker for tonight, Dr. Hart.
很高兴介绍今天的主讲人，哈特博士。
It is my honor to introduce (to you) today 's keynote speaker, prof. Lee.
很荣幸向各位介绍今天的主讲人李教授。
It is my pleasure to introduce the keynote speaker for tonight, Dr. Smith.
很荣幸介绍今晚演讲的主要来宾，史密斯博士。
He was invited to be the keynote speaker at the international management conference.
他受到邀请在国际管理大会上作主题发言。
He was invited to be the keynote speaker at the international management conference.
他受到邀请在国际管理大会上作主题发言。
应用推荐