Precambrian

/pri:'kæmbriәn/

BNC频率: 30443

n. 前寒武纪, 前寒武纪岩

n. the eon following the Hadean time and preceding the Phanerozoic eon; from about 3,800 million years ago until 544 million years ago

s of or relating to the earliest known rocks formed during the Precambrian Eon

unicellular organisms are earliest forms of life s of or belonging to earlier of two divisions of the Precambrian era

of or relating to the earliest known rocks formed during the Precambrian Eon

of or belonging to earlier of two divisions of the Precambrian era

typically Precambrian

今日更新

更新时间：2025-08-10 23:46:30