雌性野犬贝尔(Bell)捕食回来，受到11只幼犬的欢迎。它们迫不及待地想从母亲那里得到一餐反刍的肉食。
Back from a kill, Bell, the breeding female of her pack, is greeted by 11 pups, anxious to nurse and beg a meal of regurgitated meat.
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.
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