I appreciate your desire to get an answer to your question, but you will need to speak the language to be part of any discussion on this site.
@audphile1 asked you to do some research. You thanked him and said you would give it a try.
2 hours and 29 seconds later you responded with "Ok. I think I understand now."
Unless you live in the Matrix, actual learning doesn't happen that fast.
Hilarious.