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Many people don't get enough sleep, with a recent study claiming that the average Briton gets just six hours of shut-eye a night. 很多人晚上的睡眠不足。最新的一项研究表明，英国人的平均睡眠一晚上只有6个小时。 Reasons for sleepless nights vary and are often linked to underlying psychological issues ,but a new study claims that it could be down to simply not having drunk enough water the day before. 晚上睡不着的理由有很多，不过通常都和潜在心理因素有关，但是最新的研究却把它归结于前一天没有喝够水。 According to research carried out by academics at Penn State University, Pennsylvania, people who slept for six hours a night had significantly more concentrated urine and were more dehydrated compared to those who regularly slept eight hours a night, which is the recommended amount. 来自宾夕法尼亚州立大学的研究发现，就算喝了相同推荐量的水，那些每天只睡6小时一天的人，比那些每天睡8小时的人，更要频繁的上厕所和缺水。 The study, published in the journal SLEEP, involved more than 20,000 adults in the US and China, all of whom had their sleeping habits and urine samples analysed. 表在《睡眠》杂志上的研究，调查了2万多来自美国和中国的成人的睡眠习惯和排尿模式。 The authors concluded that the links between sleep quality and hydration are down to a hormone in the body called vasopressin. | 
