跷跷板；上下移动；
teeter-totter的反义词
1. 跷跷板：teeter ladder 云梯 | teeter-totter 跷跷板 | teeth forming machine for band sawblade 锯条开齿机
2. (秋千)：◆ season-ticket holder(上班族) commuter | ◆ seesaw(秋千) teeter-totter | ◆ set square (三角板) triangle
3. 公共查询·英语单词大全
3. 跷跷板,名词：teeter 摇晃, 动词 | teeter totter 跷跷板,名词 | teethe 出牙,动词
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: seesawteeterteetertotterteeterboardtilting boarddandle board
verb
1. ride on a plank
Synonym: teetertotterseesaw