cratering

['kreitəriŋ]

n. 磨顶槽

例句与用法：

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