How to make my master thesis defending smooth with good english speech? My master thesis dissertation is approaching, but I have a few concerns. First of all, I am not native English speaker. When I practiced my presentation on my own (I recorded my speech), it was not coherent to me. I feel that the transition between each sentence might be difficult to understand. Can anyone instruct me or provide me a useful English speech that is commonly used for thesis defending?

Second of all, I have limited time to present my work, and I tried to make my presentation as possible as clear to outliers. So to make the presentation clear, I have prepared some background knowledge for my audience, but the time to introduce this background knowledge in bioinformatics is more than what I expected. What should I do? My expected audience has a background in computer science, while I finished my thesis in bioinformatics. Can anyone give me possible ideas? Is there any volunteer that can give a useful English speech for thesis defense? Thanks a lot.
Use short, simple sentences.
Write a draft script to go with your slides.
Find a friend or an editor for hire to check your draft script.
Make sure you understand each of the corrections this person provides.
Create a target listener.  Ideally, this person will be well aligned with your committee members' profiles.  Reduce the background information part of your talk as much as possible.  Include only the background information your target listener really needs to hear.
Give practice talks to friends.
Videotape one of your practice talks.  Many people gesture too much with their laser pointer or ruler, so watch out for that.
After your talk, during the Question period, make sure to repeat each and every question that is posed before you start to answer it.  This will (1) ensure you have understood the question, (2) ensure everyone in the room has heard the question, and (3) buy you thinking time.  Practice doing this.