Payne and Kensinger study what happens to memories during sleep, and they have found that a person tends to hang on to the most emotional part of a memory.
佩恩和肯辛格在研究睡眠中记忆的发生了什么,他们发现一个人在睡眠时往往会停留在记忆中最激动的部分。
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It may be hard at first, but you'll quickly get thehangof it and have a good mental clock for timing your exercises.