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nglish邮发代号:21-104⊙关语围极中心高三新课程Weekly在报杏2021-2022学年第9山西师范大学主管山西师大教育科技传媒集团主办英语周报社编辑出版社长:徐文伟总编辑:刘水俊内统一刊号:CN1470网址:hp小w.ew.com.cn总第3601期2021.8.27星期五HORIZON主题语境语箱导读:人与自然一宇宙探索太阳每天准★★★★☆时升起,那么你Words:about 395是否想过太阳会Time:5 minutes有熄灭的一天What呢?如果有,那一天将会是怎样的?happenswhenthe sunburns out?There's perhapsof hydrogen it can fuse.nothingmoreEven as the core starts toancientandcollapse,the star might pushunchanging than the sun.its outer edge ever fartherThe star powers itself by fusingaway.In the end,the sun will throw off(熔化),or combining,extremely hotall of its outer layers.While about halfhydrogen atoms(氢原子)inside itsits mass will flood out,the rest willcore.That creates helium (and apush together at its center.This.willlot of energy.However,the hydrogenturn into a tiny,bright ember of thein the sun's core will run dry in theproduced all this time.When the sunsun's core,no larger than the Earth.end.When that happers,in around 5begins to fuse helium,it might seem toreturn to normal.The helium will partlySo begins the sun's long,last.billion years,the star will have to find arebuild the ruins of the core,and thelonely form.Over billions of years,new power source.At first,that won't be a problem.star will lose much of its size.over a time that's hundreds of timeslonger than the current age of theToday,fusing hydrogen also lets theAfterwards,the sun faces asun's core push back against theserious problem:As fuel,helium justuniverse,the sun will very,veryslowly-lose its remaining heat andouter layers pressing down.When thedoesn't compare to hydrogen.Fusingturn to black.core can no longer hold out,hydrogenhelium isn't nearly as energy-efficientFrom:https://www.popsci.comfrom those outer layers will flood inas fusing hydrogen,and it producesand heat up.But the side effects ofcarbon and oxygen.It's possible tothese events will cause the sun tofuse those,but it's far more difficultFind the words in the text that fit thefollowing descriptions.redden,cool,and inflate to more thanand far more inefficient.The remaininga hundred times its current size.Thenhelium will only buy the sun anotherv.to cause to increase init will transform into a huge red star.100 million years or so.size by filling with air(in paragraphIt's all for a fix of hydrogen thatWhen the sun can no longer fuse2helium,it will move onto any pockets2n.something可▣will only buy the sun an extra billionthat stays red and hotyears of life.When that,too,runs outafter a fire hashe sun will be forced to reach for thestopped burning (inext best thing:that helium it'sparagraph 5)英语周报官方微信