seesaw

1. N-COUNT 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. 蹺蹺板

There was a sandpit, a seesaw and a swing in the playground. 操場上有一個沙坑,一副蹺蹺板和一架秋千。