How should we do oral presentation well?(如何做好英语的口头演说?)

How should we do oral presentation well?(如何做好英语的口头演说?)
要求:Should describe the main idea or method,(给出主要方法)
Critical thinking,(严格思考)
Then Spectify.(以及明确答复)

Making a good oral presentation is an art that involves attention to the needs of your audience, careful planning, and attention to delivery. This page explains some of the basics of effective oral presentation. It also covers use of notes, visual aids and computer presentation software.
　　Delivering your presentation
　　People vary in their ability to speak confidently in public, but everyone gets nervous and everyone can learn how to improve their presentation skills by applying a few simple techniques.
　　The main points to pay attention to in delivery are the quality of your voice, your rapport with the audience, use of notes and use of visual aids.
　　Voice quality involves attention to volume, speed and fluency, clarity and pronunciation. The quality of your voice in a presentation will improve dramatically if you are able to practise beforehand in a room similar to the one you will be presenting in.
　　Rapport with the audience involves attention to eye contact, sensitivity to how the audience is responding to your talk and what you look like from the point of view of the audience. These can be improved by practising in front of one or two friends or video-taping your rehearsal.