These are volcanoes so explosive that they burst open in a single big crack.

这些火山爆炸性极强，爆发瞬间出现了一道大裂缝。

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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。

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Unsurprisingly, no restaurateur in his right mind would crack open a pricey vintage and agree to be paid for a single glass of it.

毫不奇怪，任何头脑清醒的餐馆老板都不愿意为了出售一杯酒，而去打开一瓶昂贵的葡萄酒。

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The super bears believe in a euro-crack up, the U.S. going to single A or even triple B credit rating, and maybe even defaulting.

FORBES: Economic End Times Not So Near, U.S. Seen Surviving 'Fiscal Cliff'