Precambrian period

英 美
  • 前寒武纪
  • period n.一段时间;周期;时期;课时;学时;句号;月经
  • precambrian n.前寒武纪;前塞武层adj.前寒武纪的;前塞武层的
Noun:
  1. the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago

【邻近词汇】