Proterozoic
/ˌprɒt(ə)rəˈzəʊɪk//ˌproʊt(ə)rrəˈzoʊɪk/
构词拆解
词源说明
释义
专有名词proper noun
- 1(geology) The eon from 2,500 Ma to 541.0±1.0 Ma, the beginning of the Phanerozoic, marked by the build up of oxygen in the atmosphere and the emergence of primitive
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