That challenges the idea that sleep is for the brain, Siegel said.
这对“睡眠是为了大脑”这个思路发出了质疑，Siegel说。
Dr. Siegel said it was remarkable how closely their sleep patterns overlapped despite the distances between them.
西格尔博士说，值得注意的是，尽管他们之间相隔十万八千里，睡眠模式却基本相同。
This suggests that humans may have evolved to sleep during the coldest hours of the day, perhaps as a way to conserve energy, Dr. Siegel said.
这表明，人类或许是在演化中形成了在一天中最冷的时间睡觉的习惯，这可能是一种节能的方式，西格尔博士说。
"Granulomas are oftentimes very hard to find and not always even present at all," said Dr. Corey Siegel, a bowel disease specialist at Dartmouth-Hitchcock Medical Center.
“通常很难发现肉芽肿，有时甚至不存在，”CoreySiegel博士谈到，他是Dartmouth - Hitchcock医学中心的一位肠道病专家。
"Granulomas are oftentimes very hard to find and not always even present at all," said Dr. Corey Siegel, a bowel disease specialist at Dartmouth-Hitchcock Medical Center.
“通常很难发现肉芽肿，有时甚至不存在，”CoreySiegel博士谈到，他是Dartmouth - Hitchcock医学中心的一位肠道病专家。
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