通常的开场白是这样的……
Ladies and gentlemen, welcome to……
但是要介绍校长老师的话，不妨用这句
Good morning/afternoon/evening，Mr./Mrs./Miss/Mdm(校长姓氏)，Mr./Mrs./Miss/Mdm(如不只一个校长)teachers and friends.…(然后接著你要讲的东西)
Mr--男性专称
Mrs.--已婚女性专称(丈夫姓)
Mdm.--已婚女性专称(自己的姓)
Miss.--未婚女性专称
Let me start by thanking...
I'm very pleased to be here.
I'm very happy to have this opportunity to...
I feel great honored to be here.
It's a pleasure for me to share my experience with you all.
We have the great pleasure to have Mr.President with us.
We are honored today to be joined by our distinguished guest,...
Today I'd like to say something about...
Well, the topic I'm going to deal with is...
I'm sure everybody is interested in... so I will share with you some...