hydrobiolite
... hydroaromatic氢化芳香族的 hydrobiolite生物堆积岩 hydrobiont水生生物 ...
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当这些生物死后，它们的外壳便会沉入水底并逐渐堆积成厚厚的石灰岩层，这就是为什么在石灰岩中经常可发现一些生物化石的原因。
When these creatures died, their shells fell to the bottom and gradually built up thick layers of limestone. For this reason, fossils are commonly found in much limestone.
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