跷跷板;
1. 跷跷板:teeter 步履蹒跚 | teeterboard 跷跷板 | teetertotter 跷跷板
2. 大跳板:22、溜冰;RollerSkating | 23、魔术古钟;MagicClock | 24、大跳板;TeeterBoard
noun
1. a plaything consisting of a board balanced on a fulcrum
the board is ridden up and down by children at either end
Synonym: seesawteeterteeter-totterteetertottertilting boarddandle board