Learn involves listen. Understand something good involves listen. Listen involves learn. Listen involves understand. Learn does not involve your computer crash. Understand something good involves listen. You spit into fan involves work for yourself. Understand something good does not involve you sell movie ticket. You watch tv involves work for yourself. Understand something good has a prerequisite of ask expert. You spit into fan involves understand. Understand something good does not involve your computer crash.
Listen does not involve learn.