These volcanoes are so explosive that they burst open in a single big crack, leaving behind a vast hole, the caldera.
这些火山具有极强的爆发性，以至于在它们从一条大的裂缝中喷涌而出，留下了一个巨大的洞，也就是火山口。
2
For the last 20 years—from the end of the cold war through two burst bubbles in a single decade—the US has been casting about for its next economic narrative.
从冷战结束到十年中两次经济泡沫破裂的过去20年里，美国一直在寻找下一个经济叙事。
3
For the last 20 years from the end of the cold war through two burst bubbles in a single decade the US has been casting about for its next economic narrative.