Seesaws
n. 跷跷板, 上下动( seesaw的名词复数 )\\nv. 使上下（来回）摇动( seesaw的第三人称单数 ); 玩跷跷板, 上下（来回）摇动
🗣️ 情景例句
All right!
好了！
He tries to button his own shirt,but he can't do it.
他试着扣好他的自己的衬衫，但是他不能做到。
The early climbers were looking for the easiest way to the top, because the summit was the prize they sought, especially if it and never been attained before.
早期登山者所寻找的是通往山顶的最方便的途径，因为顶峰特别是前人未曾到过的顶峰 -- 才是他们寻求的目标。