远古时期的动物尸体 骨头是怎样变成化石呢?
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![远古时期的动物尸体 骨头是怎样变成化石呢?](/uploads/image/z/1399510-46-0.jpg?t=%E8%BF%9C%E5%8F%A4%E6%97%B6%E6%9C%9F%E7%9A%84%E5%8A%A8%E7%89%A9%E5%B0%B8%E4%BD%93+%E9%AA%A8%E5%A4%B4%E6%98%AF%E6%80%8E%E6%A0%B7%E5%8F%98%E6%88%90%E5%8C%96%E7%9F%B3%E5%91%A2%3F)
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