托福單詞ammonoid什么意思-ammonoid詞組短語(yǔ)_例句_同義詞

ammonoid意思

[古生]菊石

ammonoid詞組短語(yǔ)

ammonoid fauna:菊石動(dòng)物群

ammonoid zone:菊石帶

ammonoid fossil:菊石化石

ammonoid facies:菊石相

ammonoid assemblage:菊石組合

ammonoid同義詞

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.

在每次物種滅絕之中，大量的菊石和體平面為少量浮游動(dòng)物所替代。

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