What i do is acknowlwdge that audience have less knowledge than you regarding the subject matter u r about to present. It helps a lot during Q&A. Also don't overwrite in slides and take it as a story u r about to tell rather than giving indepth information. If anyone is interested further...they will come after presentation and ask u more bout that. Last thing be prepared to say "I don't know" to questions u don't know...people don't take it as your lack of knwledge, its something that u didn't looked into. These things helped me a lot while i was doing my research presentations in conferences. I hope it helps.