Sea urchins are perhaps best known for their armor of spines. But their mouths may be even more daunting-urchin teeth can literally chew through stone without getting dull.

也许关于海胆，人们知道得最多的是它们的棘刺盔甲。但是，它们的口器可能更令人望而生畏——毫不夸张地说，海胆的牙齿可以把岩石咬碎，却永远不会变钝。

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But their mouths may be even more daunting-urchin teeth can literally chew through stone without getting dull.

但是，它们的口器可能更令人望而生畏——毫不夸张地说，海胆的牙齿可以把岩石咬碎，却永远不会变钝。

youdao

Thee owner laughed and said, "and pray who would want to buy that dull and dirty stone?""

主人笑着说： “请问是谁要买这块又脏又硬的石头呀?。

youdao

By comparison with the crypts, staircases and pillared halls of Knossos, the other half-dozen Minoan palaces that have been excavated around Crete are dull ground-plans in stone.

ECONOMIST: Bullshot