caldera
[kæl'dєәrә]
n. 破火山口

1. Much of Yellowstone National Park is a giant collapsed volcano, or a caldera.
   黄石园座坍塌火山，喷火山口。
2. The modern island of Santorini is now the rim of the volcano- the caldera is covered by the Aegean Sea.
   圣里位火山缘——喷火山口被琴海覆盖着。
3. Within200 kilometers of the caldera, most sunlight would be blocked out, so the sky at noon would look like that at dusk.
   火山臼周围200里，数被遮蔽，使午看像黄昏。

caldera
[ noun ]
a large crater caused by the violent explosion of a volcano that collapses into a depression
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