动物生活的

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。

Campana chuckled. “Hey, you'd better cool down, Anthony --- you're getting to be a real party animal!”

坎帕纳吃吃地笑。“嗨，你最好冷静下来，安东尼——你快变成一个真正喜结群生活的动物了！”

The results showed that there were most abundant argyrophil cells distributed in duodenum, less in large intestine and least in jejunum and ileum.

作者认为嗜银细胞的分布型与动物的生活环境是相关的。