“Middle Ordovician”的概念、定义、翻译、参考文献-科学参考

单词	Middle Ordovician
释义	Middle Ordovician [`mid·ǝl ´ȯr·dǝ`vish·ǝn] ^GEOLOGY The geologic epoch occurring between the Upper and Lower Ordovician, beginning approximately 460,000,000 years ago.
随便看	unsprung axle unsprung weight unstable unstable colon unstable equilibrium unstable graph unstable isotope unstable particle unstable wave unsteady flow unsteady-state flow unstriated fiber uns-trimethylbenzene uns-, unsym- unsurveyed area untuned unused time unwater unwind up up-and-down method upcast up-converter update update service

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