任何一个小学二年级学生都知道,人需要食物和水。只要听上一堂有关鸟类和蜜蜂的短暂课程,性别背后的逻辑就变得一清二楚。 可是,即使是地球上最有天赋的科学家也不能解释,人为什么睡觉。 睡眠专家、芝加哥大学退休教授阿伦·雷希茨查芬(Allan Rechtschaffen)博士说:“这或许是生物学最大的悬而未决的问题。” Any sophomore in primary school knows that people need food and water. Just listen to a short course on birds and bees, the logic behind the gender becomes clear. However, even the most gifted scientists on earth can not explain why people sleep. Dr. Allan Rechtschaffen, a sleep expert and retired professor at the University of Chicago, said: “This may be the biggest pending issue in biology.” "