ˈround-trip1 noun [countableC] TTTRAVELa journey to a place and back again 往返旅程 a round-trip ticket from Los Angeles to New York 从洛杉矶到纽约的往返票
30 mile/360 kilometre/2 hour etc round trip A coachload of supporters made the 700-mile round trip to South Devon. 满满一车的支持者前往南德文郡,往返路程700英里。
round-trip of It’s a round trip of 90 miles. 来回有90英里的路程。
made ... round trip• He had made the round trip in a day.
From Longman Business Dictionary
round-tripˈround-trip adjectiveadj American EnglishAmE round-trip ticket/fare etcTRAVEL a ticket etc that allows you to travel to a place and back againSYN BrE return ticket/fareThe cheaper fares will apply only to round-trip tickets with a Saturday overnight stay.