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

这时，我们的四——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。

But the electronics network, Engadget reported that the company that makes these robot " dogs" was trying to develop a similar quadruped at a price point of $1,500.

但是电子网络公司Engadget报道称，制造这些机器“狗”的公司正试图以1500美元的价格开发一种类似的四动物。

And whether this reality feels safe or scary depends on how well prepared people are to coexist with the world's largest four-legged predator.

这一存在让人感到是害怕取决于人们是否对于与世界上这最大的四捕食者共存做了打算。

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

倒下来的是一只很看的水獭，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迟早有用的技能。

And she'll have my tail cut off and my horns sawn off, and my beard plucked out, and she'll wave her wand over my beautiful clove hoofs and turn them into horrid solid hoofs like wretched horse's.

那她就会割掉我的尾巴，锯掉我的角，拔掉我的胡子，她会在我漂亮的偶蹄（哺乳动物中，牛羊属偶蹄目，四脚各有四趾，趾端有蹄，中间两个最发达）上挥动魔杖，把它们变成那种难看的奇蹄（马的四都只有一个蹄，故称奇蹄），就跟倒霉的马蹄一样。

Whitney said it was the top " predator of its environment that included different kinds of ancient fish and sharks as well as other, smaller early tetrapods."

惠特尼说，它是“其环境中的顶级捕食者，该环境中包括不同种类的古代鱼类和鲨鱼，以及其他较小的早期四动物。”

They were able to piece together evidence that the last common ancestor of all lungfish and tetrapods started vocalizing more than 400 million years ago.

他们能够拼凑出表明所有肺鱼和四动物的最后一个共同祖先在四亿多年前开始发声的证据。

In particular they sought lobe-finned fish of the type that presumably were ancestral to us and all other walking creatures, known as tetrapods.

据推测，那种鱼是所谓的四动物，即我们和其他所有会行走的动物的祖先。

Lambert called his group's discovery " the most complete specimen ever found for a four-legged whale outside of India and Pakistan" .

兰伯特称他的小组的发现是" 迄今为止在印度和巴基斯坦以外地区发现的最完整的四鲸标本。"

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物之间缺失的一环，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，现在我们认为翼龙是用四行走的方式起飞的。

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

四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。

So this is the antibiotics quadruped.

这就是我们使用的四机器人。

Quadrapeds like Pachyrhinosaurus walk on all fours.

像肿鼻角龙这样的四恐龙用部四肢行走。

It also stated that acoustic communication evolved independently in most major tetrapod groups, with origins in the range of 100 million to 200 million years ago.

研究指出，在主要的四动物种群中，声音交流进化彼此独立，起源于一亿至两亿年前。

This animal came in the nick of time for us to bag some real quadruped meat, and it was warmly welcomed.

这猪正在我们追求真正四兽肉的时候到来了，所以它很受欢迎，被留下了。

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

与许多早期四动物不同的是，人们发现了瓦切螈不同生命阶段的骨骼。

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物，作为第一批有脊椎的陆地动物而为人所知。