Unless you are really funny, it won't be yours. Avoid the use of lab jargon unless you are in your own lab. Otherwise you start to sound like an inarticulate nitwit. Clarity of speech. Don't speak with semicolons.
Simple words can be effective in science.
But try to use the right ones, and pronounce them correctly. It appears foolish to stumble over a word in front of a group. You will have to be yourself.