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How Are Seashells Formed? | eHow
瀏覽：1350
日期：2026-04-25
How Are Seashells Formed?. A seashell may look like a beautiful, hollow treasure, but to a certain sea creature it was once more than that. These sturdy shells are home to mollusks. Mollusks are invertebrate animals with slimy, fragile bodies. The shells ...看更多
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