So you'll go through all fours first.

先来到四足跪姿。

There were bipeds, tripeds and quadrupeds.

有两足、三足和四足动物。

This four-legged monster is well protected and dangerous.

这四足巨兽不仅防护严密，而且极度危险。

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

这与其它四足动物有非常大的不同。

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

这个四足着陆器高2米，宽3.5米。

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足朋友早有用的技能。

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

四足动物当中，狗是最善解人意、最聪明的动物。

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

今天，已经知道早期有三四足动物，但没有一5有关系。

Quadrapeds like Pachyrhinosaurus walk on all fours.

像肿鼻角龙这样的四足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，这四足动物只有10厘米高，约40厘米长。

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足机器人，也就是四条腿的狗一样的机器。

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

瓦切螈是一早期的四足动物，作为第一批有脊椎的陆地动物而为人所知。

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

恐龙的运动方式有两，两足运动和四足运动。

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足兽了。

The squat four legged Gastonia's heavy load slows him down to four to five miles per hour.

四足矮壮的加斯顿龙沉重的负荷使它的速度只有每小时4到5英里。

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，不管什么四足兽都不能到我的森林中来。

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，现在我们认为翼龙是用四足行走的方式起飞的。

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

与许多早期四足动物不同的是，人们发现了瓦切螈不同生命阶段的骨骼。

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足动物之间缺失的一环，所以对我们来说这期待很奇妙。

Bears are quadrupeds, meaning they walk on four legs, but they are able to stand up on their hind legs.

熊是四足动物，用四条腿走路，但他们也能用后脚站立。