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天凉起不来床？地球人都这样……又多了个赖床的理由！
Unitrans世联
文章转载自 21英语微商城 21世纪英文报
Hard to get up in winter
People often have a hard time waking up when it’s cold out. Why? A study on fruit flies (果蝇) might answer the question.
我们为啥总会觉得在天冷的时候起床更困难了？这项关于果蝇的研究或许可以帮到你！（你没有听错，是果蝇）
The study found a “thermometer circuit (温度计回路)” in fruit flies. It sends a message of coldness from their bodies to their brains. Through this circuit, coldness and darkness can stop parts of the flies’ brains from working, particularly (尤其) in the morning. These neurons (神经元) work to wake up the fruit flies. So it’s hard for fruit flies to wake up in the cold winter. Researchers said this might happen to people, too.研究发现，在果蝇体内有个“温度计回路”，它可以把“好冷”这个信息传到大脑。通过这个温度计回路的“传话”，果蝇可以在寒冷黑暗的时候让大脑部分区域停止工作，尤其是在早上。所以果蝇很难在寒冷的冬天醒来。研究人员表示，人类不想在寒冷的早上起床，也许也是同理！
Sleep calculator
If you want to get up at 7 am, when should you go to bed? A smart sleep calculator (计算器) by UK company Hillarys can tell you. Head to bed at 9:46 pm, 11:16 pm or 12:46 am if you’re a night owl (夜猫子). Tell the calculator when you need to get up, and it will work out what time you need to go to bed. 如果你想在早上7点起床，那几点睡觉合适？英国Hillarys公司的智能睡眠计算器可以告诉你答案。如果你需要在早上7点起床，那你可以在晚上9:46、11:16睡觉，如果你是夜猫子，你也可以在12:46睡觉。这入睡时间，怎么还精确到分钟了呢？
Usually, human bodies sleep in 90-minute cycles (周期). You have four or five cycles each night. If you wake up during a cycle, you will feel tired in the morning. This makes it harder to get out of bed. The calculator also uses this information. It makes sure you wake up with a spring in your step (步伐轻快)!通常，人体的睡眠周期为90分钟一周期，每晚会经历四到五个睡眠周期。如果你在睡眠周期中被叫醒，你会醒的很“痛苦”，起床气也随之而来。睡眠计算器就是运用这一原理，助你“无痛起床”！
