常見例句A flat-bottomed, roughly circular volcanic crater of explosive origin that is often filled with water.小火山口一種底部平坦、大致呈圓形的火山爆發(fā)後形成的盛滿水的低窪地A rim, as of a vessel, bell, or crater.邊容器、鈴和坑的邊緣 返回 cratering