“马科动物的社会关系是长期持久的，在某些情况下，是终生的。”科学家们补充说，他们的论文已被《动物行为》杂志所收录。

"Equid social relationships are long-lasting and, in some cases, lifelong," added the scientists, whose paper has been accepted for publication in the journal Animal Behavior.

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而且科学家表示，缺乏社会关系生活孤僻的人可能面临比吸烟更大的健康风险。

What's more, a lack of social connections could be as big a risk to your health as smoking, scientists say.

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而且科学家表示，缺乏社会关系生活孤僻的人可能面临比吸烟更大的健康风险。

What's more, a lack of social connections could be as big a risk to your health as smoking, scientists say.

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