caldera是什么意思音标:英 [kɒl'deərə]美 [kɔ:l'dɪərə]
n. 破火山口
n. a large crater caused by the violent explosion of a volcano that collapses into a depression
caldera的用法和例句：
1.Where the caldera opens up and swallows the world.
在这里岩浆将破土而出 吞噬全世界
2.Centuries ago, when the caldera was active, these vents were shrines.
几百年前 火山还活跃的时候 这些出口都是神殿
3.We could turn back and try to find another way up the caldera.
我们可以返回去 找另一条路上去