noun 下载 🔗分享 火山口,破火山口 A large crater formed by collapse of the cone or edifice of a volcano. Examples : "The caldera loomed over the town, a vast, empty space where the volcano used to stand. " 曾经火山耸立的地方,如今只剩下一个巨大的破火山口,它默默地俯瞰着小镇。 geology geography nature 与AI对话词汇游戏阅读练习