红姐统一图

日本地震加火山爆发

  

  To the Editor:

  Re “Physicists and Their Toys” (Op-Ed, Jan. 24):

  Sabine Hossenfelder makes a case against upgrading the Large Hadron Collider at CERN. Her case appears to be that the only novel thing that the existing collider has discovered is the Higgs boson, which was “reliably” predicted. She says other predictions, like the existence of various classes of new particles, are mere “guesswork” and are not worth investigating.

  In some sense almost all such predictions are guesswork. The existence of the “charmed” quark was guesswork until experiments showed that it was there.

  Big science takes various forms. The last estimate of the cost of the LIGO detector, which detected gravitational waves, was more than a billion dollars. Does Dr. Hossenfelder think that this expenditure was justified? If so, why? If not, why?

  All we found were gravitational waves that everyone was sure were going to be there. Not finding some things predicted, like various new particles, is as revealing as finding them.

  I often think that some of my colleagues are a little too exuberant. It is a morale-building exercise to say you are working on a “theory of everything.” If you are lucky, you are working on a theory of something. But you never know until you look.

  Jeremy BernsteinNew YorkThe writer is a physicist.

  To the Editor:

  Research is worthwhile only when the outcome is uncertain. Once you know the answer, no matter how interesting, it’s no longer research.

  The Large Hadron Collider, which Sabine Hossenfelder argues should not be upgraded, has been successful. It explored precisely its designated energy regime and discovered the Higgs boson.

  Particle physicists are indeed disappointed that experimental evidence for what underlies the Standard Model, the theory describing fundamental matter and forces, has not yet been observed.

  But theory and experiment are different. Theoretical predictions based on educated guesses don’t necessarily pinpoint a particle’s mass precisely. So you might find a particle or have no idea that it is there.

  An ill-conceived promotional video, mentioned by Dr. Hossenfelder, doesn’t mean that the research it describes is ill conceived. Higher energies have told us a great deal about the substructure of matter. But if you’re an instant-gratification kind of person, particle physics is not for you, since the most important discoveries took years.

  New dimensions or underlying structures might exist, but we won’t know unless we explore.

  Colliders are expensive, but so was the government shutdown. Only one of these will yield lasting insights into the nature of matter.

  Lisa RandallCambridge, Mass.The writer is a professor of physics at Harvard and the author of “Knocking on Heaven’s Door,” about the Large Hadron Collider, potential discoveries and the nature of science.

B:

  

  红姐统一图【林】【道】【丰】【感】【受】【到】【南】【屿】【王】【的】【注】【视】,【身】【子】【前】【行】【的】【速】【度】【更】【快】,【可】【是】【很】【快】【就】【被】【团】【团】【血】【雾】【覆】【盖】【住】,【动】【弹】【起】【来】【万】【分】【艰】【难】,【这】【时】【南】【屿】【王】【也】【是】【面】【露】【嘲】【讽】【之】【色】【的】【走】【来】,【林】【道】【丰】【双】【目】【闪】【烁】【着】【亮】【光】,【不】【无】【赞】【叹】【的】【说】【道】“【不】【愧】【为】【一】【代】【王】【者】,【阁】【下】【掌】【握】【着】【血】【魔】【经】,【怕】【不】【是】【会】【将】【南】【屿】【王】【朝】【带】【向】【辉】【煌】,【只】【是】【若】【是】【这】【等】【光】【宗】【耀】【祖】【的】【事】【迹】,【若】【是】【没】【有】【人】【来】【见】【证】【未】【免】

“【噗】……” 【孟】【婆】【终】【究】【是】【被】【地】【藏】【王】【这】【表】【情】【气】【吐】【了】【血】,【本】【就】【鲜】【艳】【如】【血】【的】【咬】【唇】【在】【顺】【着】【脖】【子】【往】【下】【滴】【的】【鲜】【血】【映】【衬】【下】,【几】【乎】【把】【凄】【惨】【的】【美】【发】【展】【至】【极】,【显】【得】【是】【那】【么】【惊】【心】【动】【魄】。 【只】【可】【惜】……【那】【双】【眼】【中】【的】【倔】【强】【没】【有】【减】【少】【分】【毫】,【自】【己】【又】【是】【那】【么】【道】【心】【稳】【定】【以】【色】【为】【空】,【今】【天】【注】【定】【要】【辣】【手】【摧】【花】【了】。 【孟】【婆】【容】【颜】【的】【美】,【说】【穿】【了】【不】【过】【是】【生】【物】【本】【能】【的】

【周】【六】【上】【午】,【自】【习】【课】。 【丰】【大】【成】【拿】【着】【作】【业】【纸】,【他】【根】【本】【没】【心】【思】【做】【题】,【他】【的】【期】【中】【考】【试】【成】【绩】【不】【太】【理】【想】,【换】【以】【前】【倒】【是】【没】【什】【么】。 【关】【键】【现】【在】【不】【同】【了】,【考】【到】【班】【级】【最】【佳】【进】【步】【名】【次】【可】【以】【获】【得】【观】【看】【校】【园】【偶】【像】【演】【唱】【会】【的】【名】【额】,【这】【是】【李】【校】【长】【定】【下】【来】【的】【规】【矩】。 【结】【果】【呢】,【这】【个】【进】【步】【奖】【被】【他】【后】【座】【的】【高】【强】【给】【拿】【到】【了】,【高】【强】【这】【小】【子】【一】【声】【不】【吭】【的】【偷】【偷】【用】【功】

  “【差】【着】【十】【万】【八】【千】【里】。【如】【果】【用】【来】【评】【价】【功】【力】【的】【等】【级】,【凝】【意】【成】【剑】,【到】【小】【白】【子】【这】【个】【程】【度】,【算】【是】【五】【六】【岁】【的】【小】【男】【孩】【的】【力】【气】。【而】【心】【意】【外】【放】【能】【坚】【持】【十】【分】【钟】,【就】【是】【十】【五】【六】【岁】【男】【孩】【的】【力】【气】。【如】【果】【能】【坚】【持】【两】【个】【小】【时】【以】【上】,【那】【绝】【对】【是】【三】【十】【岁】【的】【壮】【年】。” 【王】【子】【虞】【瞬】【间】【惊】【呆】【了】。【他】【很】【清】【楚】,【五】【六】【岁】【的】【小】【孩】【子】,【能】【有】【多】【大】【力】【气】。 【也】【就】【是】【说】,【白】【龘】,红姐统一图【段】【明】【泽】【再】【次】【深】【深】【地】【鞠】【了】【一】【躬】,【在】【主】【持】【人】【及】【全】【场】【观】【众】【的】【诧】【异】【目】【光】【中】,【走】【下】【了】【他】【刚】【刚】【荣】【获】【至】【高】【荣】【誉】【的】【舞】【台】…… ——【全】【场】【震】【惊】! 【一】【夕】【荣】【登】【影】【帝】,【他】【却】【说】【要】【退】【出】【演】【艺】【圈】?! 【颁】【奖】【仪】【式】【结】【束】【后】,【几】【乎】【所】【有】【的】【媒】【体】【将】【镜】【头】【对】【准】【了】【段】【明】【泽】! 【媒】【体】【记】【者】【们】【依】【然】【不】【敢】【相】【信】【他】【会】【有】【这】【样】【的】【举】【动】,【莫】【不】【是】【在】【炒】【作】【他】【自】【己】?……

  【她】【不】【喜】【欢】【被】【束】【缚】,【喜】【欢】【自】【由】。 【她】【也】【从】【来】【都】【不】【是】【心】【怀】【大】【志】【的】【人】。 “【你】【说】【她】【累】【了】,【就】【会】【回】【来】【么】?” 【这】【次】,【她】【好】【像】【不】【会】。 【季】【暖】【暖】【很】【坚】【强】,【无】【论】【是】【当】【初】【季】【家】【破】【产】【后】【还】【是】【现】【在】【一】【个】【人】【管】【着】【长】【远】,【她】【都】【在】【被】【迫】【坚】【强】【着】。 【其】【实】【她】【大】【可】【以】【回】【来】,【让】【自】【己】【给】【她】【摆】【平】【一】【切】。 【但】【她】【没】【有】。 【她】【眼】【里】【的】【感】【情】【那】【么】【明】【显】,

  【下】【了】【飞】【机】,【有】【粉】【丝】【自】【发】【的】【接】【机】【活】【动】。 YQSY【战】【队】【成】【员】【被】【一】【群】【保】【安】【一】【路】【护】【送】。 【傅】【穆】【北】【冷】【着】【脸】【走】【在】【队】【伍】【的】【最】【后】,【听】【着】【周】【围】【的】【尖】【叫】【声】【和】【喊】【自】【己】【名】【字】【的】【声】【音】,【他】【俊】【脸】【上】【越】【发】【的】【面】【无】【表】【情】。 【坐】【上】【主】【办】【发】【提】【供】【的】【印】【有】【战】【队】logo【的】【车】,【队】【员】【们】【都】【在】【热】【烈】【讨】【论】【着】【晚】【上】【去】【哪】【儿】【玩】【儿】。 【傅】【穆】【北】【从】【裤】【兜】【里】【掏】【出】【手】【机】,【开】【了】

  【皇】【家】【女】【子】【的】【这】【一】【次】【出】【手】,【让】【李】【青】【玄】【推】【断】【出】【了】【许】【多】【信】【息】。【这】【也】【让】【李】【青】【玄】【下】【定】【决】【心】,【在】【这】【次】【出】【城】【的】【过】【程】【中】【不】【到】【万】【不】【得】【已】【绝】【对】【不】【会】【让】【苏】【怡】【的】【存】【在】【暴】【露】。【经】【过】【了】【这】【一】【次】【有】【惊】【无】【险】【的】【恶】【灵】【袭】【击】,【导】【师】【让】【队】【员】【们】【原】【地】【休】【整】【处】【理】【伤】【势】。 【科】【研】【队】【员】【们】【的】【伤】【情】【基】【本】【无】【碍】,【也】【就】【是】【一】【些】【皮】【外】【伤】。【倒】【是】【有】【一】【头】【科】【恩】【兽】【的】【腿】【被】【划】【出】【了】【一】【大】【道】【口】【子】

  (来源:聂心我)

  

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