知识贝壳
知识贝壳
所属栏目：英汉古生物学专业术语
Definition: Chemical fossil. Any of various organic compounds found in ancient geologicalstrata that appear to be biological in origin and are assumed to indicate that life existed when therocks were formed. The presence of chemical fossils in Archaean st ......（本文共 401 字 ） [阅读本文] >>