SeeSaw Bike跷跷板自行车
go seesaw忽前忽后;动摇不定
pendulum seesaw钟摆式摇摇板
seesaw traction牵引支架
SeeSaw Bookshelf跷跷板书架
Interesting seesaw有趣的跷跷板
Seesaw World摇滚乐园
seesaw action跷跷板作用
seesaw mechanism跷跷板机制
N-COUNT（可数名词） A seesaw is a long board which is balanced in the middle. To play on it, a child sits on each end, and when one end goes up, the other goes down. 跷跷板
There was a sandpit, a seesaw and a swing in the playground.
操场上有一个沙坑,一副跷跷板和一架秋千。