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2019年09月16日 04:39:51    日报  参与评论()人

襄城人民医院包皮手术多少钱襄阳市中医院做割包皮要证明吗Its time to go again to the A Moment of Science mailbag. Alistener writes:又到了我们查看《科学一刻》栏目读者来信的时候了,一位听众这样写道:Dear A Moment of Science,亲爱的《科学一刻》栏目,My husband works a night shift, and Im worried that it might be affecting his health.现在我丈夫在值夜班,我很担心这样会影响他的健康。He sleepsduring the day, but somehow that doesnt seem the same as getting a good nights rest.他现在都是白天睡觉,但不知怎么回事,这样休息的效果看似不如晚上休息那么好。Am I worrying unnecessarily, or not?我的担心是否有必要呢?Actually, burning the midnight oil, as it were, may raise the risk for depression and some learningdeficits.实际上,熬夜会增加人们罹患抑郁的风险,并且会导致学习能力不足。But not only because people who work at night dont get enough sleep.但是,这并不完全是因为在晚间工作的人们没得到足够的休息。According to onestudy, scientists think its also because of too much exposure to light.根据一项研究,科学家们认为过多地暴露在光线下也是原因之一。Because it raises the levels of stress hormones in the body, hormones that have been linked todepression and to slower cognition.因为光线会使得人体内应激激素水平增加,这种激素是与抑郁情绪和缓慢的认知有联系的。Now, its worth noting that the study was done on mice.现在,值得注意的是,这项试验是在小白鼠身上进行的。And although mice are sensitive to overexposure to light in ways similar to people, how humans reactto light is not identical to mice.尽管小白鼠对于过度暴露在光线下的敏感反应与人类相似,但人类对光线的反应与小白鼠还是不尽相同的。Still, though, its also worth considering that humans evolved over millions of years rising with thesun and going to sleep when it got dark.同时,人类在几百年来的进化过程中形成的日出而作日落而息的生活习惯也是值得考虑的一个因素。Its only relatively recently, with the advent of artificiallight, that we began being exposed to light at all hours of the day and night.但是,由于近代人造光的发明,人类开始日日夜夜暴露在光线下。So its not such a radical notion that being up at night in the light when the body is built to beasleep in the dark could have some detrimental effects.因此,人们在本该休息的夜间暴露在光下工作会产生一定的不利影响,这并不是一种激进的思维方式。The science on the question is still evolving, but the bottom line is that theres some reason to bewary of being too much in the light.在这个问题上,科学知识仍在继续发展和壮大,但是过多地暴露在光线下这个问题还是需要人们警觉的。201402/275481鱼梁洲开发区看男科怎么样 Feifei:It seems you were an awful student.飞飞:看来你是个差生。Diarmuid:Well, its true I was never a swot.戴拉蒙德:嗯,这是真的,我从来就不是swot。Feifei:A what?飞飞:一个什么?Diarmuid:A swot. S.W.O.T. Swot.Can you guess what it means?戴拉蒙德:一个swot。你能猜出它的意思吗?Feifei:Well, since you say you were not a swot and you got very bad grades at school, I would say that a swot is a very good student.飞飞:嗯,既然你说你不是一个swot,而你在学校的成绩又非常糟糕,所以我猜swot代表的是非常好的学生。Diarmuid:Youre right.戴拉蒙德:完全正确。A swot is a student who spends all their time studying, or swotting.Swot指的是一个把所有的时间用于学习学生。Being a swot usually means that other students dont like you. Example成为这样的人通常意味着其他学生不会喜欢你。下面就是例子。A:Look at this old photo of our class at school.A:看这张在学校我们班级的老照片。B:Oh yes, theres Simon Studious. He was such a swot. I wonder whatever happened to him.B:哦,是的,这是好学生西蒙。他真是个学霸。我想知道他身上发生过什么。A:I heard he started his own software company; hes a multi-millionaire now.我听说他开了自己的软件公司,他现在可是个百万富翁。B:Oh. Wish Id worked a bit harder then.B:哦。真后悔当初我没好好用功。Diarmuid:But you dont have to be a student to use this word.戴拉蒙德:但你不必成为一个学生来使用这个词。We can use the verb form – to swot up – to mean learn more about anything.我们可以使用其动词形式—意思是刻苦攻读,意味着学习更多关于任何东西。Feifei:So I could say Im going to swot up on laptops because I want to buy a new computer.飞飞:所以我可以说我要研究笔记本电脑,因为我想买一台新电脑。Diarmuid:You certainly could.戴拉蒙德:你当然可以。 201309/258087襄州区人民医院男科怎么样

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襄阳四院男科割包皮 Even without the guidance of organized religion, some animals instinctively know that its a good thing to help others.即使没有类似人类宗教的指引,有些动物仍能本能地救助处于危难中的其它动物。For example, when a bird spots a predator, instead of just flying away, it calls out in alarm and warns everyone in the vicinity.比如,一只小鸟发现了捕食者,它就会发出叫声以警示和提醒附近其它的小动物们。When a dolphin is injured, other dolphins help it swim up to the surface and get some air.如果一只海豚受伤了,那么其他海豚也会帮助它一直游到岸边以呼吸新鲜空气。And in a lab experiment that was set up so that one rat had to sit on a platform or else his rat friends would get an electrical shock when they tried to feed, the rats quickly learned to cooperate and take turns sitting on the platform.在类似试验中,一只老鼠必须要坐在一个平台上以防止它的朋友们试图进食时被电击,很快老鼠们就学会了如何协作,它们轮流坐在平台上以防止同伴被电击。You might think that evolution would work against this kind of altruism since, instead of concentrating on their own survival, animals spend time and energy helping others.因为这些动物们不仅仅只关心自己的生命,也会花费时间与精力去帮助其他动物。所以,你可能会认为进化过程会有悖于这种利他主义。But evolutionists suggest that when animals help animals who are their genetic relatives, or who are likely to return the favor later on, they are actually helping their species to survive the process of natural selection.但进化论者认为,当动物们在帮助那些遗传亲属,或可能会在稍后回报其所提供的这种帮助时,它们实际上是在帮助它们的种群能够在自然选择的过程中存活下来。Some animals will even sacrifice their own lives to insure the survival of the larger group. The worker honeybee, for example, will die defending her hive if necessary.某些动物甚至会牺牲自己的生命以保全更大种群的存活。比如说工蜂,在保护蜂巢的过程中就会不惜牺牲生命。Even acts that seem selfish may end up helping the group in the long run. For instance, when there isnt enough food to go around, wasps and termites will cannibalize their nest-mates. Gruesome as this may seem, it insures the colonys survival through tough times.甚至,某些看上去貌似自私的行为实际长远看来也有助于种群存活。比如说,当附近没有足够的食物时,黄蜂和白蚁就会对它们同族的伙伴进行蚕食。也许听上去很可怕,但实际上这保了艰难时期种群的存活。Although here at A Moment of Science, we dont condone human cannibalism, we still hope that these examples of altruism in animals will give you some food for thought.我们《科学一刻》栏目虽然不能宽恕人类自相残杀的行为,但我们希望,这些存在于动物之间的利他主义将会带给大家一些发人深省的思想。 /201308/253096襄阳襄州妇幼保健院中医院治疗子宫内膜炎多少钱襄阳市中医院医术怎么样

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