Pterosaurs were the first vertebrates to master flight.

翼龙是最早掌握飞行脊动。

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

蛇类也是脊动，说明它们有脊骨。

That is basically what it means to be a vertebrate.

基本上就是脊动含义。

The smallest fish, the stout infant fish, and the smallest recorded vertebrate, this tiny little frog.

最小鱼，粗壮幼鱼，还有有记录最小脊动，小青蛙。

Large females are extremely aggressive and can easily kill scorpions or even small vertebrates like lizards.

大型雌性极有攻击性能够轻易地杀死蝎子甚至像蜥蜴一样小型脊动。

The octopus isn't a vertebrate so it can change its form and its shape very easily.

章鱼并不是脊动，所以它可以轻易改变它外形和形状。

Bulkier vertebrates have to have more massive bones.

体积较大脊动必须有更大骨骼。

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

研究人员表示，acanthothoracid是有史以来最早有齿颚脊动之一。

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

按照人类标准，有一些脊动寿命长得令人难以置信。

Now, that's incredible because snakes are of lower vertebrates.

更加令人难以置信了，因为蛇属于低等脊动。

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

头足类或许比我们脊动近亲更早演化出复杂脑部。

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

然而，在脊动中，大自然神秘模测地只选择了蛇（还有一蜥蜴）。

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

对任何脊动学来说，都是全新发现。”

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

“尽管如此，格陵兰鲨鱼仍是迄今为止科学界发现最为长寿脊动。”

In vertebrates, it is composed of blood cells suspended in blood plasma.

在脊动中，它是由悬浮在血浆中血细胞组成。

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

所有有骨架动都可以被放入一个叫做脊动大集团。

But it has a large nervous system in a range comparable to vertebrates.

但是它有庞大神经系统，范围可以跟脊动相当。

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

但是哺乳动与其他脊动 不同之处在于以下些共同特征。

That would make it the largest concentration of land vertebrates anywhere on Earth.

是地球上陆生脊动密度最高地方。

So do many other vertebrate animals, including snakes, dogs, cats, sharks, and chimpanzees.

其他脊动也是如此，包括蛇、狗、猫、鲨鱼和黑猩猩。