core steinkern
基礎(chǔ)科學(xué)

        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(nèi)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(nèi)核化石,其表面為外殼的內(nèi)模......（本文共 365 字）     [閱讀本文] >>