Horses and ponies are actually members of the same species, equus calibus.

马和小型马其实是同一种的成员，也就是马动。

Bovids, equids and, in particular, canids, were put to work by H.sapiens; felids always took a slightly different view of the matter, but were indulged for their rodent-catching talents.

牛动、马动，尤其是犬动，都是分工的；猫动略有不同，但受宠的原因主要是捕捉啮齿类生的天性。

Equids originally evolved in North America.

马动最初是在北美演化出来的。

Various ideas have been tossed around in the last 150 years about the African equids' stripes.

在过去的150年里，关于非洲马动的条纹有各种各样的观点。

So whether you're riding high up on a horse or practicing prancing with a pony, they're all equines in the end.

所以不管你是骑着高高的马，还是和小型马一起练习跳跃，它们其实都是马动。

The study is in the journal Proceedings of the Royal Society B. Various ideas have been tossed around in the last 150 years about the African equids' stripes.

这项研究发表在《英国皇家学会学报B》。过去150年来，们提出了各种关于非洲马动条纹的想法。

With the help of these adaptations, equines like Merychippus were able to grow larger than forest-dwelling horses, reaching up to 450 kilograms.

在这些适应性进化帮助下， 像梅里奇普这样的马动体型变得比森林居住的马大，体重可达450公斤。

For instance, the eight species of wild equids (horses and their relatives) vary greatly in disposition, even though all eight are genetically so close to each other that they will interbreed and produce healthy (though usually sterile) offspring.

例如，八种野生马动（马及其近亲）的性情差异很大，尽管所有八种野生马动在基因非常接近，以至于它们会杂交并产生健康（尽管通常不育）的后代。