天涯部落

小圈子,大声音!呼朋引伴网聚部落!

创建新部落?

武汉/那里能做精子检查?飞度技术免费医生

楼主:飞度管家搜医生 时间:2017年10月18日 20:55:41 点击:0 回复:0
脱水模式给他打赏只看楼主阅读设置
This vast forest circling the globe contains a third of all the trees on Earth这片环绕着地球的广大森林容纳了地球上1/3的树木and produces so much oxygen it changes the composition of the atmosphere.产生了大量氧气,从而改变了大气成分As we travel south so the sun#39;s influence grows stronger随着我们向南行进,太阳的影响力逐渐增强and at 50 degrees of latitude a radical transformation begins.北纬50°的地方是一场重大变革的起点Summers here are long enough for broadleaf trees to replace conifers.由于有足够长的夏季,阔叶林得以取代针叶林Broadleaves are much easier to eat and digest阔叶树的树叶更容易食用和消化so now animals can collect their share of the energy that has come from the sun.因此动物们也能获得太阳馈赠给它们的那部分能量It#39;s summer and these forests are bustling with life.现在是夏天,森林中一片生机勃勃的景象But the good times will not last.可是好景不长Broad leaves must be shed in winter for their damage by frost.由于严寒的原因,阔叶树得在冬天落叶As they disappear, so the land becomes barren with little for animals to eat.树叶消失之后,大地一片荒凉,动物们的食物日益稀少The inhabitants must migrate, hibernate, or face months of near starvation.居民们只得迁往他处,或者冬眠,或者忍受几个月的饥荒 Article/201701/486879社交网络正把人与人之间的关系变得更为密切或更为疏远,TED演讲者们对网络革命的影响各抒己见。 Article/201504/367587His newfound ability to concentrate他现在能够集中注意力is largely thanks to a drug called methylphenidate,多亏了这种叫哌醋甲酯的药best known to most of us by a brand name - Ritalin.大家更熟悉的是它的商品名 利他林It takes about 30-40 minutes for it to work,大概30到40分钟就能发挥药效and it#39;s not like Liam suddenly goes docile.当然也并非利亚姆突然就变温顺It just basically does have a calming effect on him.它只是有种镇定的功效He doesn#39;t seem to be as hyperactive他不再过度亢奋on the medication and he is able to sit quietly,药期间他可以安静地坐着be able to focus on things like his homework可以集中精力在他的作业上or just, just basically have或者 只是...a more normal life, really.只是过上正常一点的生活And, as for thousands of other children,如同对成千上万其他孩子一样Ritalin has had a remarkable effect on Liam.利他林对利亚姆非常有效I feel calm.我感觉很镇静I don#39;t feel like excited.没有觉得很激动I feel energy because I我以前觉得精力充沛can just run around all day if I wanted to如果我愿意我可以跑一天but I#39;m just calm now.但我现在只是觉得很镇静And I#39;m excited as well.也有点兴奋 Article/201501/355663But the debate will only be concluded不过只有当我们找到确凿的据when we find firm evidence.才能推断出这样的命题What is it about cooking food,烹煮食物究竟是怎样which could have had such a powerful effect on our bodies?对我们身体产生巨大影响的It#39;s a vexed question,这是个难题which is being investigated by the scientific community around the world.全世界许多科学家们都致力于这方面的研究To answer this question,为了解答这个问题Professor Wrangham is not working with humans.朗汉教授选择的研究对象不是人类His subjects are mice, whose normal diet is raw food.他的实验对象是通常都吃生食的小鼠To start with, the mice are given a diet of raw yams for four days.开始时 连续4天为小鼠提供生番薯We#39;re feeding them this delicious raw sweet potato,我们给小鼠吃美味的生番薯and like any other wild animal adapted to starch-rich food,鉴于野生动物都很适应高淀粉的食物we#39;re expecting them to do very well.我们希望小鼠也会喜欢 Article/201505/375466The hunt is on. Three dogs close in on one impala. Missed.狩猎开始。3只野紧追一只黑班羚。没捉到。The lead dog drives the impala towards the hidden flankers.头犬将黑斑羚赶向侧翼的埋伏区Anticipating their line, the leader cuts the corner and joins a flanker for the final assault.它估计了一下它们逃跑的路线,然后立刻从边角切入,从侧翼加入这次总攻It#39;s all or nothing. One on one.成败在此一举。一对一。The dog has stamina, the impala has speed.野拥有耐力,而黑斑羚拥有速度Leaping into the lake is an act of desperation - impala can barely swim.跳入湖中是绝望的选择,黑斑羚可不太会游泳The dogs know their prey must come out or drown - now it#39;s a waiting game.野们知道它们的猎物迟早会上岸,否则就会淹死,现在,它们只需等待The rest of the pack are calling.群中的其它成员正在发出呼唤They#39;ve made a kill in the forest and this is an invitation to join in the meal.它们已在树丛中捕到了一只猎物,这是邀请它们加入宴席的信号The impala is in luck.这只黑斑羚非常走运A pack this size kills once a day and everything is shared.这种规模的群每天都得进行一次捕杀,并且一起分享猎物And this impala is reprieved.这只黑斑羚只不过被延缓了行刑的日子 Article/201702/492974

All cells of the body use vitamin A身体内所有细胞都利用维生素Ato regulate these events. Vitamin A helps调节这些活动,维生素A还帮助to form skin and mucus membranes and keeps them healthy.形成皮肤和粘膜,并使它们保持健康Skin and mucus membranes are important皮肤及粘膜对于in helping our bodies avoid infections帮助我们身体抵御感染十分重要and are found all over our bodies: eyes, mouth,而且遍布全身:眼睛,口腔respiratory tract, urinary tract and alimentary tract.呼吸道,尿道,以及消化道Carotenoids are dark colored dyes found in plant foods类胡萝卜素是一种在果蔬中的深色染料that can turn into a form of vitamin A.它可以转变成一种维生素AOne carotenoid is beta carotene有一种类胡萝卜素叫β-胡萝卜素which is an antioxidant which protects cells from damage它是一种抗氧化剂,能保护细胞免于伤害and oxidative stress and和氧化therefore helps with decreasing the risk of cancer.因此它能帮助降低患癌症的几率Vitamin A also plays a role维生素A也在调节in the regulation of the immune system.免疫系统中发挥着作用It may help in the development of a certain type of它可以促进一种white blood cell called lymphocytes which are essential叫淋巴球的白细胞的形成in fighting infections from viruses and bacteria.淋巴球对于抵御病毒和细菌感染有十分重要Vitamin A also maintains the cell维生素A也能维护that keeps up the membrane associated with the eyes眼睛and respiratory, urinary and intestinal tracts.及呼吸道,尿道,肠道的膜上的细胞When vitamin A is deficient these cells become damaged缺乏维生素A时,这些细胞就遭到破坏resulting in leaks in the membranes发生细胞膜渗漏through which bacteria can then enter and cause infection.细菌便会通过细胞膜进入导致感染The units of vitamin A that you will see reported include你们会看到,维生素A的单位包括both micrograms and international units or IUs.微克和国际单位,简称IUIUs are used because foods contain compounds使用国际单位是因为食物中含有that can be converted to vitamin A in the body.可以在人体内转化为维生素A的成分Beta carotene is the most abundant of these compounds.β-胡萝卜素,是这些成分中最多的About one third of the beta carotene我们摄入的β-胡萝卜素约有三分之一that we consume from foods is converted to vitamin A会被转化为维生素Atherefore IUs take into account the ability因此使用国际单位能of the human body to use these sources of vitamin A.将人类身体利用这些维生素A来源的能力考虑进来The daily recommended intakes for vitamin A19岁以上成年男子for adult males, 19 years of age and above,每日推荐的维生素A摄入量are 3000 IUs or 900 micrograms. For women为3000个国际单位或900微克,女性所需的the intake is lower, 2310 IUs or 700 micrograms.摄入量少些,为2310个国际单位或700微克Pregnant and lactating women have increased needs:怀的和哺乳期的女性需要更多:2565 IUs or 770 micrograms for pregnant women妇需要2565单位或770毫克and 4300 IUs or 1300 micrograms for lactating women.毫克,哺乳期女性需要4300国际单位或1300微克Here#39;s a list of good food sources for vitamin A.这里列出了含有维生素A的优质食物来源Green leafy vegetables and brightly colored orange绿叶蔬菜和颜色鲜亮的橙子and yellow vegetables are easy to remember以及黄色的蔬菜是很容易记住的as excellent sources of vitamin A.绝好的维生素A来源A sweet potato baked in its skin contains 24877 IUs一个带皮的烤红薯含有24877国际单位of vitamin A, mostly in the form of beta carotene.的维生素A,其中大多是β-胡萝卜素Even though this seems like a large amount of vitamin A尽管这看起来是很大量的维生素Athere is no evidence that food sources of vitamin A但是没有据表明含维生素A的食物can produce toxicity.会产生毒性As mentioned the body converts only a small amount像之前说的,人体仅将很少量的of beta carotene to the vitamin.β-胡萝卜素转化成维生素Here#39;s some more food sources of vitamin A.这里还有更多的一些含维生素A的食物As you can see green leafy vegetables你可以看到,绿叶菜是维生素A的are excellent sources of vitamin A.绝佳食物来源Look for really dark green vegetables such as spinach看看深绿色蔬菜,比如菠菜which contains about 7370 IUs of vitamin A含有大约7370国际单位的维生素Awhich makes up 150% of这相当于每日推荐the total daily recommended intake.摄入总量的150%Beef liver is also an excellent source of vitamin A牛肝也是一种绝好的维生素A的食物来源which contains 27185 IUs of vitamin A含有27185国际单位的维生素Aor 545% of the total daily recommended intake.相当于每日推荐摄入量的545%Egg yolks and fortified egg substitutes蛋黄和强化的鸡蛋替代品are also sources of vitamin A也含有维生素Aalthough not as high as liver尽管其含量没有肝脏and green leafy vegetables.和绿叶菜所含的多When using supplements be cautious of any that在使用补品的时候,要谨慎选择contain more than 200% of the RDA for vitamin A.任何含有超过200%每日推荐维生素A摄入量的补品As mentioned vitamin A is stored in the body之前提到过,维生素A会被贮存在体内and can be toxic.并且会产生毒性 Article/201507/384555

Around 7 hundred million years, our planet started to cool.大约7亿年前 地球开始降温。It was the beginning of an Ice Age.是一次冰河时代的发端No one is quire sure why it happened,没人能确定发生原因,but it seems that our entire word was plungedces into an interminable winter.冰从地球两极不断蔓延 直至将整个世界拖入一个漫长的冰封冬季。Some scientists have called it the time of snowball Earth.某些科学家称这段时期为“雪球地球”because the whole planet would appear as an icy ball.因为当时整个行星 看起来就是一个冰球。Others believe that the Earth was cold but not completely frozen.其他一些人认为地球是冷的 但是并没有完全冰冻Traveler to Jupiter and you can get some idea of what Earth might have looked like.去木星看看 您对地球当时可能的模样就有些概念Europa is one of Jupiter#39;s moons.A frozen landscape欧罗巴是木星卫星之一that might mirror parts of Earth millions of years ago.冰冻现象可能是地球 数百万年前的一面镜子but knowing what earth look like 仅仅知道地球的模样doesn#39;t convey just how terrible the conditions would have been.并不能准确体会到当时的情况A blizzard, high in the Alps, in mid-winter, is as close as I can get.冬季阿尔卑斯高处的暴风雪 是我能接触到的与当时最接近的情况 Article/201508/395271

  • 武汉/阿波罗男科医院是公办还是私人
  • 武汉/阴茎勃起不硬怎么办飞度技术健康门户
  • 武汉/切除包皮需要多少钱飞度新闻免费平台
  • 应城市人民医院男科电话
  • 武汉/市第五医院有治疗前列腺炎吗飞度指定医院
  • 武汉/生育检查飞度好专家武汉/哪里看疱疹
  • 飞度咨询页武汉/总院人民医院男科咨询
  • 度排名健康管家孝感医院男科飞度咨询咨询病种
  • 应城市人民医院阳痿早泄价格
  • 武汉/男性早泄怎么治飞度新闻养生在线
  • 武汉/人民医院泌尿外科电话飞度管家免费问武汉/治疗梅毒医院哪家最好
  • 武汉/阿波罗男子门诊专家预约
  • 飞度技术资讯信息咸宁市第一人民医院男科
  • 武汉/包皮手术费用要多少
  • 飞度快问答网武汉/哪里医院能治疗精囊炎飞排名快对话网
  • 飞度新闻好医生武汉/割包皮
  • 咸宁市第一人民医院男科挂号飞排名搜医生武汉/治疗附睾炎多少钱
  • 飞度技术免费咨询武汉/哪家男科医院治疗早泄最好飞度技术免费问
  • 武汉/男性性咨询飞度黑龙江新闻
  • 武汉/包茎手术费
  • 武汉/新洲区治疗性功能障碍多少钱
  • 飞度好医生黄冈红安县治疗阳痿哪家医院最好
  • 飞管家快交流网鄂州市中心医院看泌尿科怎么样
  • 华中科技大学同济医学院附属同济医院不孕不育多少钱度排名快答
  • 武汉/哪家医院治疗面瘫好
  • 通城县人民医院有治疗前列腺炎吗
  • 武汉/硬不起来
  • 武汉/包皮包茎手术得多少钱飞度【知道健康】
  • 飞度新闻搜医生武汉/人民医院中医科专家
  • 通城县人民医院前列腺炎多少钱
  • 相关阅读
  • 瞒天过海!集体耕地上建厂房!村民:相关部门集体哑火(三)
  • 暮影战神武灵攻略大全
  • 唐嫣赵丽颖吴昕林允儿李易峰和谁最有感(图)
  • 酒类电商双罢斗
  • 南京查处违规补缴社保证明份购房证明被注销
  • 内蒙古自治区政协原副主席赵黎平一审被判处死刑
  • 近日李念与刚斩获年北京青年电影节影帝的巩峥出现在街边
  • 徐娇穿白袜撑伞古典韵味十足邻家有女初长成
  • 单机斗地主下载:首存优惠
  • 小学生作业本开口说话曝光盗伐林木团伙
  • 相关推荐

    发表回复

    请遵守天涯社区公约言论规则,不得违反国家法律法规