听力帮帮团进阶day1稿拓展

WhatIfYouStoppedGoing149 million six hundred thousandkilometersaway,sunlightisbeingejectedfromtheSunshootingacrossthesolarsystemthroughouratmosphereandifthetimingisright,landingdirectlyonyourskin.Feelsgood,doesn'tit?Andit'sthissunlightthatbeginsanamazingchainreactionwhichhelpstosustainyourlife.Thesunshinevitamin-vitaminDthatis.Interestingly,someofthecholesterolyouconsumeisalteredandstoredinyourskin.

地球距离1亿4960万千⽶，光穿过系，穿越⼤⽓层，若是时机刚⼗分美妙，难道不是吗?正是光以延续。阳光维其实指的就是维他命D。有趣的是，⼈们消耗的部分胆固数字英⽂读法读法⽰例：oneonehundredandtwenty-three从左到右逗号分别读为fourhundredandfifty-sixtrillion万 billion⼗sevenhundredandeighty-ninemillion百 thousandonehundredandtwenty-chainreactionchain本意指的是“链⼦”—引申出“supplychain供应链；achainsmoker烟⿁；achainstore连锁商店；productionchain⽣产链；以及我们最熟悉的foodchain⾷物链cholesterol[kə’lestərɒl]胆固醇chole胆汁+sterol固WhatWhatisCholesterolisawaxy,fat-likesubstancethat'sfoundinallthecellsinyourbody.Yourbodyneedssomecholesteroltomakehormones,vitaminD,andsubstancesthathelpyoudigestfoods.Healthproblemscausedbyhighcholesterol：angina[æn’dʒaɪnə]⼼绞痛/heartattack⼼脏病发作/carotidarterydisease[kə’rɒtɪd]颈动脉疾病/stroke中风/peripheralarterialdisease[pə’rɪf(ə)r(ə)l]外周动脉疾病Andwhenthatwell-traveledultravioletBsunlighthitsyourskinitmodifiedthischolesterol.Thenewmoleculetravelsthroughthebloodstreamtotheliverwhereit’salteredagainandthentothekidneywhereit’sbiologicallyactivated.ThisactivatedvitaminDworkstoabsorbcalciumfromyourfood,ultimayleadingtobonegrowthandstrength.

中的胆固醇发⽣转化。形成的新分⼦通过⾎液进⼊肝脏，进⼀步转化后进⼊肾脏，在那⾥，分⼦的⽣物活性得到激活。这些被激活的维他命D能够帮助机体从⾷物中吸收钙光谱波长分布UltravioletUltravioletB（UVB紫外线）对⼈体具有红斑作⽤，能促进体内矿物质⽣素D的形 eyecataracts[‘kætərækts]⽩内障,anddamagetotheenvironment.⼈体常量元素碳氢钙钾potassium氧磷phosphorus镁magnesium钠硫sulfur氯chlorine⼈体必需微量元素钼钼铁碘iodine锌zinc⼈体主要AnywayyourskinneedstheSunandtheSungrowsyourbones.Perhapswearen'tsodifferentfromnts.WithoutvitaminDyourbodywouldnotonlysufferdecreasedmineralizationofyourbonesleadingtodiseaseslikeosteoporosisbutalsoseeadecreaseinimmunefunction.Furthermorethere'sevidencetosuggestthatvitaminDhelpspreventcancer,heartdiseaseanddepression,whichmayexinwhythoseincolderclimateswithlessdaylightoftenexperiencethewinterblues.

⽆论如何，⽪肤需要，帮助⾻骼⽣长。或许我们和植物并没有那么不同。没有维D，你的⾝体不仅会⾻骼矿物质减少，造成⾻质疏松症等疾病，还会导致免疫功能下降。此外，有表明，维D可以预防，⼼脏病和抑郁症，这或以解释为什么⽇照时间较短，⽓候寒冷地区的⼈们