a piece of equipment for children to play on consisting of a long flat piece of wood that is supported in the middle. A child sits at each end and makes the see-saw move up and down.
Ví dụ:
- Can we go on the see-saw?
a situation in which things keep changing from one state to another and back again
Ví dụ:
- The match was a see-saw battle between the two teams.