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

同样，从脊椎的底部开始。

The individual units resemble vertebrae in the human spine.

每个单独的单位类似于类脊椎的椎骨。

The first animals to develop a backbone were fishes.

第一种进化出脊椎的动物鱼类。

It's the world's largest invertebrate, which is an animal with no backbone.

它世界上最大的无脊椎动物，也就有脊椎的动物。

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

它脊椎最长的部分。

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

切螈一种早期的四足动物，作第一批有脊椎的陆地动物而所知。

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

事实上，瑞奇想帮助其他脊椎受伤的。

The study also did not include kinds of animals such as invertebrates, or animals without a backbone, like insects.

该研究也不包括无脊椎动物等动物，或昆虫等有脊椎的动物。

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

陆地脊椎动物，即有脊骨或脊椎的动物，出现在大约3。75亿年前。

They also help evenly distribute the load that our spine is supporting.

它们还有助于均匀分散我们脊椎支撑的负荷。

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

而你的头，你的脊椎，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，陆地脊椎动物，也就有脊骨或脊椎的动物，开始出现。

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什么你的脊椎沿着背部往下的原因。

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

但巴雅达龙的脊椎和我们今天的角化动物由同样的角蛋白材料制成的。

Pterosaurs were the first vertebrates to master flight.

翼龙最早掌握飞行的脊椎动物。

Their vertebrae are about 25 centimeters.

它们的脊椎长约25厘米。

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

每根脊椎骨的重量都超过100公斤。

Babies' spines just have one curve like a " c."

婴儿的脊椎只有一个弧度，就像字母C一样。

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。给你看看我脊椎里的凹陷。

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

它可能死于脊椎骨的严重断裂。