“Upper Ordovician”的概念、定义、翻译、参考文献-科学参考

单词	Upper Ordovician
释义	Upper Ordovician [`ǝp·ǝr ´ȯr·dǝ`vish·ǝn] ^GEOLOGY The latest epoch of the Ordovician period of geologic time, beginning approximately 440 million years ago.
随便看	gravitational mass gravitational potential gravitational potential energy gravitational pressure gravitational radiation gravitational radius gravitational redshift gravitational repulsion gravitational settling gravitational sliding gravitational systems of units gravitational tide gravitational water gravitational wave gravitino gravitoelectric field gravitomagnetic field gravitometer graviton gravitropism gravity gravity anomaly gravity bar gravity bed gravity cell

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