The study results suggest that sleep before learning may be important, too, just as experts have known that sleep after learning is crucial to solidify information learned, Walker says.

沃克说：这项研究的结果表明，学习前的睡眠可能也是很重要的，正如专家们都知道，学习后的睡眠是非常重要的，这可以巩固学到的信息。

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The benefits to memory of a nap, says Dr Walker, are so great that they can equal an entire night’s sleep.

沃克博士说，小睡的好处非常大，甚至抵得过一整夜的睡眠。

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Matthew Walker, a professor of psychology and neuroscience at the University of California, Berkeley, and his colleagues recruited 27 women and 17 men to come to the sleep lab.

加州大学伯克利分校心理与神经系统科学教授马修·沃克尔和同事招募了27名女性志愿者和17名男性志愿者，在睡眠实验室进行实验。

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"You don't have to restore brain cells to restore sleep, " said Dr Walker who described their aim as "jump-starting" the system.

BBC: Boosting sleep 'may slow memory rot'