Equids originally evolved in North America.

马科动物最初是在北演化出来的。

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，古老的马科物种开始穿越白令陆桥。

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

在去的150年里，关马科动物身上的条纹有各种各样的观点。

Equines are the subfamily of equids that includes modern horses.

马科动物是包括现代马在内的马科动物亚科。

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科动物：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.

牛科动物、马科动物，尤其是犬科动物，都是由智分工的；猫科动物略有不同，但受宠的原因主要是捕捉啮齿类生物的天性。

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学会学报 B 期刊上。在去的 150 年里，们对马的条纹提出了各种不同的看法。