core steinkern
基礎科學

        Definition: Rock material formed from consolidated mud or sediment that filled a holloworganic structure,such as a fossil shell. The fossil formed after dissolution of the mold.內核nèihé指生物遺體中空部分的充填物,如雙殼類和腕足類常形成內核化石,其表面為外殼的內模......（本文共 365 字）     [閱讀本文] >>