他们分别在杜塞尔多夫和波鸿附近被捕。

They were arrested in Duesseldorf and nearby Bochum.

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德国波鸿-鲁尔大学的科学家揭开了这个奥秘。

Scientists at Germany's Ruhr-University Bochum are figuring out how they do it.

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2011年6月30日，在德国波鸿的一场比赛中，加拿大球员Kaylyn Kyle和法国球员Gaetane Thiney(左)分别跳跃起来去争夺足球。

Kaylyn Kyle of Canada and Gaetane Thiney (left) of France jump for the ball during their match in Bochum, Germany June 30, 2011. (Ina Fassbender/Reuters)

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