(Good morning, afternoon, evening)
I'm happy to be here.
I'm glad to have this opportunity to . . .
Today, I'd like to talk (to you) about . . .
My topic today is . . .
The focus of my remarks is . . .
I'd like to share some thoughts on (topic)
Let me start by . . .
First, let me tell you about . . .
I've divided my topic into (three) parts: (They are . . .)
Let me illustrate,
To sum up,