英语词汇“lower pennsylvanian”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	lower pennsylvanian
释义	Lower Pennsylvanian Lower Pennsylvanian [′lō·ər ‚pen·səl′vā·nyən] (geology) The earliest epoch of the Pennsylvanian period of geologic time, beginning about 310,000,000 years ago.
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Lower Pennsylvanian