结束语-In conclusion, I'd like to...-I'd like to finish by...-Finally...-By way of conclusion...-I hope I have made myself understood-I hope you have found this useful-I hope this has given you some idea/clear idea/an outline of...-Let me end by saying...-That, then was all I had to say on...-That concludes our presentation...-I hope I've managed to give you a clearer picture of...-If there are any questions, I'd be delighted to...-Thank you for your attention...-Let's break for a coffee at this point-I am afraid that the clock is against us, so we had better stop here-You have been a very attentive audience---thank you