“Cretaceous Period”的概念、定义、翻译、参考文献-科学参考

单词	Cretaceous Period
释义	Cretaceous Period Encyclopedia 理学中生代释 Cretaceous Period白垩纪中生代最后一个纪（第三个纪）。约开始于1.37亿年前，结束于0.65亿年前。白垩纪形成的地层称白垩系（Cretaceous System）。
随便看	pairing vibration pair-instability supernova pair model of magnetocrystalline anisotropy pair of algebraic varieties pair of bases pair of complex conjugate roots pair of elements pair of galaxies pair of identified points pair of linear spaces pair of points pair of radio sources pair of stars pair operator pair potential pair production pair production detector pair production effect pair-production instability pair production telescope pair programming pairs distribution method pair skating pair sum pair symmetry

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