基本解释n.磨顶槽同根派生 英汉例句A flat-bottomed, roughly circular volcanic crater of explosive origin that is often filled with water.小火山口一种底部平坦、大致呈圆形的火山爆发后形成的盛满水的低洼地A rim, as of a vessel, bell, or crater.边容器、铃和坑的边缘