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: seesaw teeter teeter-totter teetertotter tilting board dandle board