Please explain in two layers:
Layer 1, Beginner version. Use everyday language and a concrete example so that someone with no background can understand.
Layer 2, Professional version. Use accurate terminology to clearly explain the core mechanism, applicable boundaries, and common misconceptions.
Finally, please organize: 1. A mapping between beginner terms and professional terms; 2. The places I am most likely to misunderstand; 3. 3 questions to check whether I truly understand.
