“index fossil”的中英文读音、翻译、固定搭配用法、短语词组及例句-英语词汇-学习网

单词	index fossil
释义	index fossiln.（名词） The fossil remains of an organism that lived in a particular geologic age, used to identify or date the rock or rock layer in which it is found. Also called guide fossil 标准化石：生存于某一特定地质年代的有机体所形成的化石，可以根据这种化石判定它所在的岩石或岩石层形成的年代也作 guide fossil
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