And that's where our four-legged friends, the cows, come to the rescue.

这时，我们的四朋友——牛——就会来拯救我们。

It's the famous robot quadruped, or four-legged dog-like machine from Boston Dynamics.

这是波士顿动力公司著名的四机器人，也就是四条腿的狗一样的机器。

And the situation is very different with other four-legged animals, tetrapods.

这种情况与其它四动有非常大的不同。

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

瓦切螈是一种早期的四动，第一批有脊椎的陆地动而人所知。

The four-legged lander is two meters tall and 3.5 meters wide.

这个四着陆器高2米，宽3.5米。

Today three early tetrapods are known and none has five digits.

今天，已经知道早期有三种四动，有一种跟数字5有关系。

This four-legged monster is well protected and dangerous.

这种四巨兽不仅防护严密，而且极度危险。

They aren't frequented by lions, tigers, panthers, or other quadrupeds. They're known only to me.

狮子，老虎，豹子，等等，不管什么四兽都不能到我的森林中来。

It was a magnificent sea otter from the genus Enhydra, the only exclusively marine quadruped.

倒下来的是一只很好看的水獭，一只水兽，它可能是住在海中的唯一的四兽了。

Particularly if those skills might come in handy for our four-footed little friends.

尤其是碰到我们可爱的四朋友迟早有用的技能。

The dog is the most knowing and clever of all four-footed animals.

四动当中，狗是最善解人意、最聪明的动。

So you'll go through all fours first.

先来到四跪姿。

There were bipeds, tripeds and quadrupeds.

有两、三和四动。

Quadrapeds like Pachyrhinosaurus walk on all fours.

像肿鼻角龙这样的四恐龙用全部四肢行走。

The four-legged animal is believed to have been just 10 centimeters tall and about 40 centimeters long.

据信，这种四动只有10厘米高，约40厘米长。

This was the missing link between bony fishes and tetrapods, including human beings, so this was a fantastic expectation.

这是硬骨鱼和包括人类在内的四动之间缺失的一环，所以对我们来说这种期待很奇妙。

So, we've kind of moved on from a bird launch, and now we think that they were launching quadrupedally.

我们研究了鸟类起飞的姿势，现在我们认翼龙是用四行走的方式起飞的。

There are two forms of locomotion in dinosaurs, there is bipedal and quadrupedal.

恐龙的运动方式有两种，两运动和四运动。

Unlike many early tetrapods, bones of Whatcheeria have been discovered from different points in the animal's life.

与许多早期四动不同的是，人们发现了瓦切螈不同生命阶段的骨骼。

Game with four paws, Professor Aronnax, Ned Land replied. All these pigeons are only appetizers, snacks.

还短一只四的猎，阿龙纳斯先生。尼德·兰回答，所有这些鸽子、山鸠都不过是零食和小吃。