Except by assigning such general and vague reasons, we cannot explain why, in many quarters of the world, hoofed quadrupeds have not acquired much elongated necks or other means for browsing on the higher branches of trees.
Arrazoi orokor eta lanbrotsuok aipatuz izan ezik, ez dugu azaltzerik zergatik ez duten berenganatu, apaxdun lauoinekoek, munduko alde askotan, zuhaitzen goi-adarretatik jateko lepo luzerik edo beste bitartekorik.