Precambrian shield前寒武纪地盾
Precambrian Geology前寒武纪地质;前寒武纪地质学
precambrian strata前寒武纪地层
Middle Precambrian中前寒武纪
precambrian Prec前寒武系
precambrian Pe前寒武系
precambrian paleomagnetic前寒武纪古地磁
Early Precambrian早前寒武纪
precambrian Å前寒武纪
ADJ（形容词） of, denoting, or formed in the earliest geological era, which lasted for about 4000000000 years before the Cambrian period 前寒武纪(寒武纪前的时期，持续了大约四十亿年)的
N（名词） the Precambrian era 前寒武纪→see Archaeozoic, Proterozoic