balance beam
noun /ˈbæləns biːm/
  /ˈbæləns biːm/
(North American English) (also beam especially in British English)
- a wooden bar that is used in the sport of gymnastics for people to move and balance on平衡木 - The gymnasts finish with floor exercises and the balance beam.体操运动员以自由体操和平衡木项目结束比赛。 
 
- The gymnasts finish with floor exercises and the balance beam.