Pterosaurs were the first vertebrates to master flight.

是最早掌握飞行脊椎动。

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

蛇类也是脊椎动，说明它们有脊椎骨。

That is basically what it means to be a vertebrate.

这基本上就是脊椎动含义。

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椎动。

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

章鱼并不是脊椎动，所以它可以轻易改变它外形和形状。

Bulkier vertebrates have to have more massive bones.

体积较大脊椎动必须有更大骨骼。

These were the ancestors of today's land vertebrates – animals such as amphibians, reptiles, birds and mammals.

它们是如今陆地脊椎动祖先，如两栖动、爬行动、鸟类和哺乳动。

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

最小鱼，粗壮幼鱼，还有有记录最小脊椎动，这种小青蛙。

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

按照人类标准，有一些脊椎动寿命长得令人难以置信。

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

头足类或许比我们脊椎动更早演化出复杂脑部。

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

研究人员表示，acanthothoracid是有史以来最早有牙齿颚脊椎动之一。

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

然而，在脊椎动中，大自然神秘模测地只选择了蛇（还有一种蜥蜴）。

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

这对任何脊椎动学来说，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椎动。”

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

在脊椎动中，它是由悬浮在血浆中血细胞组成。

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

但是它有庞大神经系统，范围可以跟脊椎动相当。

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

但是哺乳动与其他脊椎动 不同之处在于以下这些共同特征。

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

这是地球上陆生脊椎动密度最高地方。

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

其他脊椎动也是如此，包括蛇、狗、猫、鲨鱼和黑猩猩。

The two largest groups of animals are vertebrates and invertbrates.

最大两个类别是脊椎动和无脊椎动。