In many countries in the world social differences in health are also growing, and this is true in Europe.

在许多国家中，健康问题反映出的社会差异也在加剧，欧洲的情况正是如此。

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There could be genetic or social differences among the Sami, who are distinct from their Finnish and Swedish neighbors, Helle said.

赫勒说，与其芬兰和瑞典邻居都大不相同的拉普人族群本身可能有遗传上或是社会文化上的差别。

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Throughout history, biological explanations have been used as weapons to explain and maintain social differences, ' she added.

她补充说：“纵观历史，生理上的理由一直被用作武器来解释和维持社会上的差异。”

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These difficulties - not to mention social differences - make comparison of crime rates between countries difficult.

BBC: What's the price of DVD players got to do with crime?

Social differences are coming back to haunt the fighters, too.

ECONOMIST: Rebel forces

But although cultural and social differences may play a role in the increase in attacks, defections by Afghan security, sometimes motivated by economic reasons, play a far more significant part in the green-on-blue attacks.

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