revolve round something

Từ điển Oxford Advanced Learner 8th

▪ I. reˈvolve around/round sb/sth derived
to have sb/sth as the main interest or subject
•His whole life revolves around surfing.
•She thinks that the world revolves around her.
•The discussion revolved around the question of changing the club's name.
Main entry: ↑revolve_derived
 
▪ II. reˈvolve around/round sth derived
to move around sth in a circle
•The earth revolves around the sun.
Main entry: ↑revolve_derived