“白垩”的概念、定义、翻译、参考文献-科学参考

单词	白垩
释义	白垩 Encyclopedia 工学[矿物材料]释 chalk白垩主要由显微粒状石灰质岩石和海生生物（如贝壳、有孔虫等）的遗骸以及颗粒细小（0.01～0.0005毫米）的方解石组成的一种生物化学沉积岩。理学白垩释 chalk白垩白色疏松土状的石灰岩。
随便看	orientation polarization orientation-preserving orientation-preserving automorphism orientation-preserving isomorphism orientation-preserving mapping orientation quantization orientation reaction orientation-reversing orientation-reversing chain orientation-reversing loop orientation-reversing mapping orientation selectivity orientation sheaf orientation star orientation state structure of polymers orientation sub orientation telesthesia orientation variable oriented oriented area oriented atlas oriented attachment oriented basis oriented bordism oriented boundary

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