托福单词ammonoid什么意思-ammonoid词组短语_例句_同义词

ammonoid意思

[古生]菊石

ammonoid词组短语

ammonoid fauna:菊石动物群

ammonoid zone:菊石带

ammonoid fossil:菊石化石

ammonoid facies:菊石相

ammonoid assemblage:菊石组合

ammonoid同义词

n.

fossil

ammonoid例句

1.After each extinction,a rich variety of ammonoid species and body plans was replaced by a few free-floating types.

在每次物种灭绝之中，大量的菊石和体平面为少量浮游动物所替代。