第 9 页精品文档---下载后可任意编辑托福双语素材 Why teenagers need more sleep托福备考过程中最重要的一项策略就是合理利用拓展阅读材料，通过精读可以积累重点词汇词组和亮眼表达，通过泛读可以培育对英文书面材料的敏感度，而有些特定话题的内容也可以作为托福口语和托福写作的话题拓展材料进行积累，不用担忧考试时遇到题目大脑一片空白。下面我们来看一篇相对简单的双语材料：Why teenagers need more sleep In the UK, the clocks go back(句型) by one hour on Sunday to mark the end of British Summer Time. Experts have been weighing up(句型) a more permanent time shift in our daily schedules, particularly for tired teenagers who struggle with early school starts. 每年入冬时，英国把时钟往后拨 1 个小时，这标志着夏令时结束。专家们在考虑对我们的日常作息时间作出更为永久性的调整，特别是针对那些困难应对大清早上学的没睡醒的青少年。The rethink on teen slumber is largely due to the emerging science on circadian rhythms. The genetics associated with body clocks earned this years Nobel Prize for physiology or medicine. The timing of release of the sleep hormone melatonin is thought to change with age: during adolescence, secretion begins late at night and continues until about 8am. The sleep rhythm of a teenager can lag an adult by two to three hours.重新思索青少年的睡眠问题，在很大程度上是因为新兴的昼夜节律科学。与生物钟有关的基因讨论赢得了今年的诺贝尔生理学或医学奖。人体释放睡眠荷尔蒙褪黑激素的时间据信会随着年龄转变：在青春期，褪黑激素在深夜开始释放并持续到早上 8 点左右。青少年的睡眠节律可能比成年人晚两到三个小时。circadian ADJ of or relating to biological processes that occur regularly at about 24-hour intervals, even in the absence of periodicity in the environmentmelatonin N the hormone-like secretion of the pineal gland, causing skin colour changes in some animals and thought to be involved in reproductive functionN-UNCOUN...
