英语词汇“helderbergian”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典-现代词典

单词	helderbergian
释义	Helderbergian Helderbergian [‚hel·dər′bərg·ē·ən] (geology) A North American stage of geologic time, in the lower Lower Devonian.
随便看	mjtkop mjtll mjtm mjtp mjttf mju mjua mju alert mjug mjukvarukonstruktion m julian masselon mjuo mjur mjusd mjv mjva mjvm mjv smith mjw mjwcf mjwcl mjwe mjwf mjwg mjwl

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Helderbergian