例句:游乐场上有一处沙坑、一块跷跷板和一个秋千架。 There was a sandpit, a seesaw and a swing in the playground.本回答被网友采纳
第2个回答 2016-07-27
seesaw
A seesaw is a long board which is balanced on a fixed part in the middle. To play on it, a child sits on each end, and when one end goes up, the other goes down.