欢迎听众(正式)
- Welcome to our company
- I am pleased to be able to welcome you to our company...
- I'd like to thank you for coming.
- May I take this opportunity of thanking you for coming

欢迎听众(非正式 )
- I'm glad you could all get here...
- I'm glad to see so many people here.
- It's great to be back here.
- Hello again everybody. Thank you for being on time/making the effort to come today.
- Welcome to X Part II.

受邀请在会议上致词
- I am delighted/pleased/glad to have the opportunity to present/of making this presentation...
- I am grateful for the opportunity to present...
- I'd like to thank you for inviting/asking me/giving me the chance to...
- Good morning/afternoon/evening ladies and gentleman
- It's my pleasant duty today to...
- I've been asked to...

告知演讲的话题
- The subject of my presentation is...
- I shall be speaking today about...
- My presentation concerns...
- Today's topic is...
- Today we are here to give a presentation on...
- Today we are here to talk about...Before we start, I'd like you meet my team members...
- A brief look at today's agenda...(告诉听众所讲内容的先后顺序)
- Before we start our presentation, let's take a brief look at the agenda...
- I shall be offering a brief analysis of...
- The main area that I intend to cover in this presentation is...
- Take a moment and think of...
- Thank you for giving me the opportunity to tell you about...