当食物短缺时，反刍动物比非反刍动物寿命更长，因为反刍动物可以从同样的食物中获得更多的能量。
When food is in short supply, a ruminant can last longer than a nonruminant because it can derive more energy out of the same food.
非反刍动物并不能从植物的坚硬部分汲取太多能量；但是它们的肠胃能够快速地消化并且处理食物，从而大大地弥补了这方面的不足。
Nonruminants cannot extract much energy from the hard parts of a plant; however, this is more than made up for by the fast speed at which food passes through their guts.
在深及膝盖的草中咀嚼反刍食物的母牛非常满足，但我们在一无所缺时仍然是这样渴想神。
The cow, chewing its cud in knee-high grass, is utterly content. Yet we thirst for God even in the midst of plenty.
试想，如果骆驼长了翅膀，它们就会在我们的屋顶随意嬉闹，还会吐下来它们反刍过的食物，那会多么让人厌恶啊。
Just think, if camels had wings, they would go romping about on our roofs and spitting down their cud, and what a nuisance that would be.
附近地里的牛仍在安静地反刍食物。
The cow in the nearby field was still chewing placidly on its cud.
一只长有红色盔突的雄犀鸟带着早餐翩然而至。 雄犀鸟将会把食物反刍给它大约3个月大的雏鸟，雏鸟安全地在一棵鸡骨常山属树木的巢穴里。
Room service: A red-knobbed hornbill arrives with breakfast, which he will regurgitate for his roughly three-month-old chick safely inside a nest hole in an Alstonia tree.
食物选择是反刍动物营养生态学的重要研究内容之一。
Research advances in diet selection mechanisms of grazing herbivores;
食物选择是反刍动物营养生态学的重要研究内容之一。
Research advances in diet selection mechanisms of grazing herbivores;
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