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[00:00.00]在线英语听力室( www.tingroom.com )友情制作 [00:05.20]1995 [00:07.51]Sleep is divided into periods of so-called REM sleep, [00:11.56]characterized by rapid eye movements and dreaming, [00:14.68]and longer periods of non-REM sleep. [00:17.50

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Unit5 PartB How Our Memory Works Try to imagine a life without a memory. It would be impossible. You couldn't use a language, because you wouldn't remember the words. You couldn't understand a film, because you need to hold the first part of the stor

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If you could add cells anywhere in your body, you might pick your brain. More brain cells should make you smarter, right? Well, a new study shows that they might just make you fatter. Becauseanimals that make new nerve cells in a brain region that co

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Why Can't You Tickle Yourself Have you ever thought about why people are ticklish? According to scientists, ticklishness is a defense mechanism humans developed against bugs, spiders, and other critte

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Have you ever thought about why people are ticklish? According to scientists, ticklishness is a defense mechanism humans developed against bugs, spiders, and other critters that may be touching our skin. Feeling ticklish is our built-in response to p

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We're only beginning to understand why we sleep to begin with, but we do know it's essential. Adults need 7 to 8 hours sleep at night, and adolescents need about 10. We grow sleepy due the signals from our body telling our brain we are tired, and sig

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