英语词汇“upper ordovician”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	upper ordovician
释义	Upper Ordovician Upper Ordovician [′əp·ər ‚ȯr·də′vish·ən] (geology) The latest epoch of the Ordovician period of geologic time, beginning approximately 440 million years ago.
随便看	by someone's bootstraps by someone's fingertips by someone's own bootstraps femtometre femtometres femtomole femtonewton femto-satellite femto-second femtosecond femtosecond chemistry femtosecond pulse shaping femtosecond technology research association femtosecond time-resolved optical polarigraphy femtosecond transition spectroscopy femtotech femtotechnology femtovolt femtowatt femtrace femu femur femur-fibula-ulna syndrome femur length femur length/abdominal circumference ratio

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Upper Ordovician