Snakes are also vertebrates, which means that they have a backbone.

蛇类也是脊椎动物，说明它们有脊椎骨。

All animals with backbones are put into one big group called vertebrates.

所有有骨架的动物都可以被放入一个叫做脊椎动物大集团。

Vertebrates are divided into different classes, or groups.

脊椎动物被分为不同的纲或群。

Cephalopods may have evolved complex brains long before our vertebrate relatives.

头足类或许比我们的脊椎动物近亲更早演化出复杂的脑部。

The researchers say the acanthothoracid was one of the earliest jawed vertebrates with teeth ever to live.

研究人员表示，acanthothoracid是有史以来最早的有牙的颚脊椎动物之一。

But, of the vertebrates unpredictable Nature selected only snakes (and one lizard).

然而，在脊椎动物中，大自然神秘模测地只选择了蛇（还有一种蜥蜴）。

By human standards, a few vertebrate species have incredible longevity.

按照人类的标准，有一些脊椎动物的寿命长得令人难以置信。

" That still makes the Greenland shark the longest-living vertebrate known to science."

“尽管如此，格鱼仍是迄今为止科学界发现的最为长寿的脊椎动物。”

And that's completely brand new to science in any vertebrate animal.

这对任何脊椎动物学来说，都是全新的发现。”

But mammals are distinguished from other vertebrates by a number of shared features.

但是哺乳动物与其他脊椎动物的 不同之处在于以下这些共同特征。

They are vertebrates, which means they have backbones, and, like mammals, they are warm-blooded.

它们是脊椎动物，也就是说它们有脊柱，和哺乳动物一样，它们是恒温动物。

To survive, they race to maturity, with the shortest generation time of any vertebrate.

为了活下去，它们以脊椎动物中最短的代时争先恐后地长大成熟。

Among vertebrates, we actually see the greatest size variation in the cerebellum, not the neocortex.

在脊椎动物中，我们实际上在小脑而不是大脑皮层看到了最大的尺寸变化。

The two largest groups of animals are vertebrates and invertbrates.

最大的两个类别是脊椎动物和无脊椎动物。

Everyone knows that fish make up the fourth and last class in the vertebrate branch.

大家知道鱼类是脊推动物门中的第四纲和最后一纲。

Over the past 500 years, more than 300 species of vertebrates like these have disappeared.

但在过去的500年中, 超过300种脊椎动物已经从地球上消失。

Vertebrates are animals that have spines, or backbones.

脊椎动物有脊椎骨。

Studying it reveals to us the evolutionary path towards the more complex nervous systems of vertebrates.

研究它向我们揭示了脊椎动物更复杂的神经系统的进化路径。

Vertebrates are animals with backbones and bones inside their bodies. The bones help to support their bodies.

脊椎动物是身体里边有脊椎和骨头的动物。这些骨头来帮助支撑他们的身体。

This suggests that one species can learn from another—a trick previously thought to be confined to vertebrates.

这暗示一物种可以向另一物种学习——过去人们认为只有脊椎动物才有这种本领。