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在输入“2013年职称英语新增文章”后，选择你需要的—— 例 2013年职称英语（卫生类）新增文章译文及解析 阅读理解 第十六篇 Eat to Live A meager diet may give you health and long life, but it‟s not much fun — and it mightnot even be necessary. We may be able to hang on to most of that youthful vigor even if we don‟t start to diet until old age. Stephen Spindler and his colleagues from the University of California at Riverside havefound that some of an elderly mouse‟s liver genes can be made to behave as they did when the mouse was young simply by limiting its food for four weeks. The geneticrejuvenation won‟t reverse other damage caused by time for the mouse, but could help itsliver metabolize drugs or get rid of toxins.Spindler‟s team fed three mice a normal diet for their whole lives, and fed another three on half-rations3. Three more mice were switched from the normal diet to half-feed3 for amonth when they were 34 months old — equivalent to about 70 human years. The researchers checked the activity of 11,000 genes from the mouse livers, and foundthat 46 changed with age in the normally fed mice. The changes were associated withthings like inflammation and free radical production一 probably bad news for mousehealth. In the mice that had dieted all their lives,27 of those 46 genes continued to behavelike young genes. But the most surprising finding was that the mice that only started dieting in old age also benefited from 70 per cent of these gene changes.＂This is the first indication that these effects kick in pretty quickly,” says Huber Warnerfrom the National Institute on Aging near Washington D. C. No one yet knows if calorie restriction works in people as it does in mice, but Spindler ishopeful. “There‟s attracting and tempting evidence out there that it will work,” he says.If it does work in people,there might be good reasons for rejuvenating the liver. As weget older, our bodies are less efficient at metabolizing drugs, for example. A brief periodof time of dieting, says Spindler, could be enough to make sure a drug is effective.But Spindler isn‟t sure the trade-off is worth it. “The mice get less disease, they live longer, but they‟re hungry,” he says. “Even seeing what a diet does, it‟s still hard to go to a restaurant and say： „I can only eat half of that,. ”Spindler hopes we soon won‟t need to diet at all. His company, Lifespan Genetics inCalifornia, is looking for drugs that have the effects of calorie restriction.词汇： ……
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2013年职称英语卫生类新增文章你好， 2013年职称英语卫生类阅读理解和完形填空新增文章一共6篇。 阅读理解 卫生C级第十六篇 Eat to Live 卫生B级第十九篇 Prolonging Human Life 卫生A级第二十四篇 Sleep...
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