Proterozoic eon

英

美

网络  元古代; 元古宙

网络

英英释义

noun

• from 2,500 to 544 million years ago
  Synonym:ProterozoicProterozoic aeon

双语例句

• Developmental features of the Middle-Upper Proterozoic Eon in East China and its significance in the study of plates and geotexture
  中国东部中上元古宇发育特征及其对板块和地体构造研究的意义
• The Proterozoic climate was still warm and wet, but compared with that of the Archaeozoic Eon, the temperature fell a little.
  元古宙的气候仍是温暖而潮湿的，但较太古宙温度有所降低。