Equids originally evolved in North America.

马动最初是在北美演化出来的。

Sometime after 4 million years ago, ancient equid species began trotting across the Bering land bridge.

在 400 万年前的某个时候，古老的马种开始穿越白令陆。

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

在去的150年里，关于非洲马动的条纹有各种各样的观点。

Equines are the subfamily of equids that includes modern horses.

马动是包括现代马在内的马动亚。

And one of the most important likely descendants of Miohippus was an equid that was even better adapted to life on the plains: Parahippus.

Miohippus 最重要的可能后代之一是一种更适应平原生活的马动：Parahippus。

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，都是由智人分工的；猫动略有不同，但受宠的原因主要是捕捉啮齿类生的天性。

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.

这项研究发表在皇家会报 B 期刊。在去的 150 年里，人们对非洲马的条纹提出了各种不同的看法。