Most mammals are vertebrates.

大多数哺乳动物都是脊椎动物。

Over the past 500 years, more than 300 kinds of vertebrates have disappeared from the earth.

在过去的500年中, 超过300种脊椎动物已经从地球上消失了。

This study was jointly completed by vertebrate biologists and microbiologists.

这次研究是脊椎动物生物学家和微生物学家共同完成的。

Birds, fish, and reptiles are all vertebrates.

鸟类 鱼类和爬行动物都是脊椎动物

The vertebrate brain is the most complex example of a modular system.

脊椎动物的大脑正是这样的复杂功能模块。

The abundance of vertebrate species fell by a third between 1970 and 2006.

在1970年到2006年之间，本来丰富的脊椎动物物种减少了三分之一。

The heart is one of first organs to form during organogenesis in the vertebrate.

心脏是脊椎动物器官发生过程中最早形成的器官之一。

The heart is one of the first formed structures during organogenesis in vertebrate.

心脏是脊椎动物器官发生过程中最早形成的结构之一。

The heart is one of first structures to form during organogenesis in the vertebrate.

心脏是脊椎动物器官发生过程中最早形成的结构之一。