The individual units resemble vertebrae in the human spine.

每个单独的单位类似于人类的骨。

The first animals to develop a backbone were fishes.

第一种进化出的物是鱼类。

Again, just starting right there at the base of the spine.

同样，从的底。

It's the longest stretch of your spinal column that is shown.

它是最长的分。

Whatcheeria was an early tetrapod, as the first land animals with backbones were known.

瓦切螈是一种早期的四足物，作为第一批有的陆地物而为人所。

The rods bridged the break at the top of Ricky's backbone.

这些长棒连接了瑞奇顶端的断裂处。

In fact Ricky wants to work with other people that have injuries to their backbones.

事实上，瑞奇想帮助其他受伤的人。

The land vertebrates - animals that have a backbone or spine - showed up some 375 million years ago.

陆地物，即有骨或的物，出现在大约3。75亿年前。

Your head, your spine, everything else wants to keep going in a straight line.

而你的头，你的，所有的东西则都要想要继续走直线。

The land vertebrates – animals that have a backbone or spine – showed up some 375 million years ago.

大约3。75亿年前，陆地物，也就是有骨或的物，出现。

A worm doing the backstroke might be the reason your spine runs down your back.

那只做仰泳的蠕虫可能就是为什么你的沿着背往下的原因。

But Bajadasaurus spine's made of the same keratin material as our horned animals of today.

但是巴雅达龙的和我们今天的角化物是由同样的角蛋白材料制成的。

That is basically what it means to be a vertebrate.

这基本上就是物的含义。

Pterosaurs were the first vertebrates to master flight.

翼龙是最早掌握飞行的物。

Their vertebrae are about 25 centimeters.

它们的长约25厘米。

Each back bone, or vertebra, weighs more than 100 kilograms.

每根骨的重量都超过100公斤。

You're embarrassing me. Oh, don't be embarrassed. I'll show you the divot in my spine.

你让我好尴尬。噢，别害羞嘛。给你看看我里的凹陷。

It was likely killed by a severe break of its backbone.

它可能是死于骨的严重断裂。

So invertebrate animals are animals that don't have a backbone.

所以无物是没有的物。

My spine was chipped in eight places. Four ribs were broken.

我的有八处碎裂。断了四根肋骨。