catapult

详细解释:n. 弹射器, 弹弓, 弩炮
vt. 发射

词型变化：

动词过去式:catapulted过去分词:catapulted现在分词:catapulting第三人称单数:catapults

英语解释：

名词 catapult:

a plaything consisting of a Y-shaped stick with elastic between the arms; used to propel small stones同义词：slingshot, sling