n.脊椎动物；羊膜动物
adj.脊椎动物的；羊膜动物的
The evolutionary step that freed these animals from the water was the development of the amniote egg. 使这些动物得以脱离水生活的进化步骤是羊膜卵得改进。
There are abundant wildlives in our country, just amniote is nearly six thousand, senior plants are over thirty thousand. 我国野生动植物物种丰富，仅脊椎动物就约有6000多种左右，高等植物3万多种。
China is rich /abundant in wildlife species, just amniote alone is nearly six thousand, senior plants are over thirty thousand. 我国野生动植物物种丰富，仅脊椎动物就约有6000多种左右，高等植物3万多种。
[医] 无羊膜动物
羊膜类, 羊膜动物
