swings and roundabouts

Từ điển Oxford Advanced Learner 8th

ˌswings and ˈroundabouts idiom
(BrE, informal)used to say that there are advantages and disadvantages whatever decision you make
•If you earn more, you pay more in tax, so it's all swings and roundabouts.
•What you gain on the swings you may lose on the roundabouts.
Main entry: ↑swing_idiom