ring around

Từ điển Oxford Advanced Learner 8th

▪ I. ˌring aˈround derived
= ↑ring round
Main entry: ↑ring_derived
 
▪ II. ˌring ˈround (sb/sth) | ˌring aˈround (sb/sth) derived
(BrE)to telephone a number of people in order to organize sth or to get some information, etc
•I rang round all the travel agents in the area.
Main entry: ↑ring_derived