To teach or suggest things to people with little knowledge, but no matter how many times it will not understand or did not intend to listen to. Does not follow the teaching time to empty.
To teach or suggest things to people who have little knowledge. But no matter how many times teachers still do not understand or do not intend to listen refused to follow an instruction is wasted.
Teaching or suggest things to people with little knowledge. But no matter how many times I still don't understand or intend to listen, don't do that, the instructor is a waste of time.