proterozoic
美 英
n. 元古代
adj. 元古代的
英英释义
Noun- from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
Adjective- formed in the later of two divisions of the Precambrian era;
"proterozoic life forms"
例句
用作名词(n.)- Early Proterozoic high-pressure metamorphism in the Wutaishan.五台山早元古代高压变质作用研究。
- Wangjiawaizi gold deposit occurrs in Lower Proterozoic opimetamorphic rock series.王家崴子金矿床赋存于辽南古元古代浅变质岩系中。
用作形容词(adj.)- Boron deposits of eastern Liaoning occur in a suite of Early Proterozoic metamorphic rocks, with boron orebodies existent in magnesian marble.辽东硼矿床产于早元古代的一套变质岩内，硼矿体赋存于镁质大理岩中。
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