狗群四散离去。

The dogs scattered and left.

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Coren教授说，狗知道的是自己在他们社会群体中的地位，他在狗群中是位高还是位低。

What dogs do know, said Professor Coren, is their position within their social group, whether they are at the top or the bottom of their pack.

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但是规模稍小的狗群中，捕猎或看护小狗都会遭受损失，要么这些狗就得增加出猎的次数作为弥补——这本身就需要狗群付出代价。

But with smaller packs, either the hunting or the babysitting suffers, or the animals have to compensate by increasing the number of hunting excursions - which itself carries a cost to the pack.

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