Definition:寒武紀(jì)演化動(dòng)物群hán wǔ jì yǎn huà dòng wù qún顯生宙三大演化動(dòng)物群之一,繁盛于寒武紀(jì),以三葉蟲(chóng)、無(wú)鉸腕足類、軟舌螺等為代表。Cambrian:the Cambrian period or the system of rocks deposited during it前寒武紀(jì)的qiánhán wǔ jì deevolutiona......(本文共 331 字) [閱讀本文] >>