This was a landscape where antelope of all kinds abounded—along with Bos primigenius, a kind of oxen that has become extinct.
这是一片充满了各种羚羊的土地——还有原牛,一种已经灭绝的牛。
Under these circumstances, archaeologist Andrew Smith believes, the small herds of Bos primigenius in the desert became smaller, more closely knit breeding units as the drought took hold.