- At the end of this presentation you will understand why this company has been so successful for so long...;

- I am going to be talking about a product that could double your profit margins...

- the next ten minutes will change your attitude to sales and marketing...

- Over the next ten minutes you are going to hear about something that will change the way your companies operate...

- By the end of this presentation you will know all there is to know about...

结尾

结束语有这样几种比较精彩的选择:

   -Finally...