| 单词 |
chemical fossils |
| 释义 |
chemical fossils
chemical fossils[¦kem·i·kəl ′fäs·əlz] (geology) biomarkers chemical fossils
chemical fossils traces of chemicals such as porphyrins and alkanes which are said to be indications of life having existed before the formation of true fossil-bearing rocks. |
| 随便看 |
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