德国不莱梅大学的查尔斯·罗伯特和他的同事们认为他们得出了一种答案。

Now Charles Robert of the University of Bremen, Germany, and colleagues think they have an answer.

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和德国不一样，你不能把不莱梅和汉堡的比赛拿来比较，因为它们其实不在一座城市，所以北伦敦德比更重要。

There is nothing similar in Germany. You cannot compare Bremen against Hamburg because they are not quite in the same city, so the London derby is bigger.

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不莱梅大学的学者Stefan Luft说，在大城市里，移民的孩子们聚集在没有德国本地孩子的地方，然后去学校，这就使移民的孩子和德国本地的孩子很难融合在一起。

In big cities they crowd together and go to schools from which native German children have fled, making it harder to integrate, says Stefan Luft, a scholar at the University of Bremen.

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