火山口的用法和樣例：
例句
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火山口火山爆發而形成的環形山或大山核心部分的崩塌而形成的環形山
A large crater formed by volcanic explosion or by collapse of a volcanic cone. -
小火山口一種底部平坦、大致呈圓形的火山爆發后形成的盛滿水的低洼地
A flat-bottomed, roughly circular volcanic crater of explosive origin that is often filled with water. -
火焰從火山口猛烈地噴出來。
Flames blazed out from the crater of the volcano.
