英语词汇“middle cambrian”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	middle cambrian
释义	DictionarySeeAcadian epoch Middle Cambrian Middle Cambrian [′mid·əl ′kam·brē·ən] (geology) The geologic epoch occurring between Upper and Lower Cambrian, beginning approximately 540,000,000 years ago.
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Middle Cambrian