teetertotter
名词 teetertotter:
a plaything consisting of a board balanced on a fulcrum; the board is ridden up and down by children at either end
同义词:seesaw, teeter, teeter-totter, teeterboard, tilting board, dandle board
动词 teetertotter:
ride on a plank
同义词:teeter-totter, seesaw