| 释义 |
Precambrian
[ˌpri:'kæm.bri.ən] adjective
■from or referring to the earliest period of geological time, between about 4,600 and 543 million years ago, from when the Earth was formed until the first simple forms of life appeared 前寒武纪的（源自或指最早的地质时期，即约46亿年至5.43亿年前之间，自地球开始形成起至第一个简单形式的生命出现）•the Precambrian era/period前寒武纪时代／时期 •Precambrian rocks前寒武纪岩石 |