“bone chert”的概念、定义、翻译、参考文献-科学参考

单词	bone chert
释义	bone chert [`bōn ´chǝrt] ^PETROLOGY A weathered residual chert that appears chalky and porous with a white color but may be stained red or other colors.
随便看	separation filter separation layer separation negatives separation of variables separation theorem separative work unit separator separator-filter separator page separatory funnel sepatrix sepia sepia negative Sepioidea sepiolite Sepsidae sepsis septal filament septal ostium septarian septarian boulder septarian nodule septarium septate septate coaxial cavity

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