You can also have low, padded and carpeted seesaws.

你还可以用零角碎料，制作低矮的翘翘板。

Seesaws may be fun, but the implications and possible uses of levers get much more impressive than that.

有趣的跷跷板背后隐藏的是深刻的杠杆的原理和可能的用途。

N . an outdoor area set aside for recreation and play, especially one containing equipment such as seesaws and swings.

操场；运动场；游乐场：用于消遣和玩耍的户外场地，尤指提供，如跷跷板和秋千等设备。