贝克为德国的低失业率给出了一个看上去合理的解释。但这个解释正确么？

Becker provides a plausible explanation of Germany's lower unemployment rate, but is it correct?

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我们可能在不同睡眠阶段学习的不一样，吕贝克大学的德国睡眠专家教授简·伯恩说。

We may learn differently during different sleep stages, says German sleep expert Professor Jan Born from the University of Lübeck.

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德国汉堡市的哈根·贝克动物园内，一只火烈鸟站立在冰雪覆盖的围栏内。

A flamingo is seen in the snow-covered outdoor enclosure of the Hagenbeck Zoo in Hamburg, Germany.

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