Unlike other types of fossils which are typically impressions or compressions, petrified wood is a three-dimensional representation of the original organic material.
Unlike other types of fossils which are typically impressions or compressions, petrified wood is a three dimensional representation of the original organic material.
Unlike other types of fossils which are typically impressions or compressions, petrified wood is a three dimensional representation of the original organic material.
让这更容易理解: Unlike other types of fossils which are typically impressions or compressions, petrified wood is a three-dimensional representation of the original organic material. 输出: