单词：Proterozoic
音标：[.prɒtәrә'zәuik] ；
n. 元古代, 元古代岩
a. 元古代的, 元古代岩的
a. 元古代的, 元古代岩的
n. from 2,500 to 544 million years ago; bacteria and fungi; primitive multicellular organisms
s. formed in the later of two divisions of the Precambrian era
s. formed in the later of two divisions of the Precambrian era
词型变化：名词复数形式 : proterozoics
Proterozoic的用法和样例：
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。