n.脊椎動(dòng)物；羊膜動(dòng)物

adj.脊椎動(dòng)物的；羊膜動(dòng)物的

The evolutionary step that freed these animals from the water was the development of the amniote egg. 使這些動(dòng)物得以脫離水生活的進(jìn)化步驟是羊膜卵得改進(jìn)。

There are abundant wildlives in our country, just amniote is nearly six thousand, senior plants are over thirty thousand. 我國(guó)野生動(dòng)植物物種豐富，僅脊椎動(dòng)物就約有6000多種左右，高等植物3萬(wàn)多種。

China is rich /abundant in wildlife species, just amniote alone is nearly six thousand, senior plants are over thirty thousand. 我國(guó)野生動(dòng)植物物種豐富，僅脊椎動(dòng)物就約有6000多種左右，高等植物3萬(wàn)多種。

[醫(yī)] 無(wú)羊膜動(dòng)物

羊膜類, 羊膜動(dòng)物