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It's a requirement for life, but scientists can't explain why we require sleep. Seriously… they have no idea. What we do know, is that your body starts doing some crazy stuff while you're out. 睡眠是生活的必需，然而科学家们却不能阐明其原因。说实在的，他们毫无头绪。而我们清楚的是：在你熟睡时，你的身体会开始做出一些疯狂的举动。 | 
