University of Pennsylvania researchers found that subjects who were limited to only 4.5 hours of sleep a night for one week reported feeling more stressed, angry, sad, and mentally exhausted.
宾夕法尼亚大学的研究者们做了一项试验，参加试验的人们在一周中每晚只有4.5小时的睡眠时间，而他们普遍表示，这一周中他们感觉更有压力，感受到了愤怒、沮丧、和心力交瘁。