新概念优美背诵短文.docx

新概念优美背诵短文

新概念优美背诵短文 导语：下面是小编整理的关于新概念英语的优美背诵短文，有需要的同学快点mark起来，含中文翻译哦！ ScientificTheories Inscience,atheoryisareasonableexplanationofobservedeventsthatarerelated.Atheoryofteninvolvesanimaginarymodelthathelpsscientistspicturethewayanobservedeventcouldbeproduced.Agoodexampleofthisisfoundinthekineticmoleculartheory,inwhichgasesarepicturedasbeingmadeupofmanysmallparticlesthatareinconstantmotion. Ausefultheory,inadditiontoexplainingpastobservations,helpstopredicteventsthathavenotasyetbeenobserved.Afteratheoryhasbeenpublicized,scientistsdesignexperimentstotestthetheory.Ifobservationsconfirmthescientist’spredictions,thetheoryissupported.Ifobservationsdonotconfirmthepredictions,thescientistsmustsearchfurther.Theremaybeafaultintheexperiment,orthetheorymayhavetoberevisedorrejected. Scienceinvolvesimaginationandcreativethinkingaswellascollectinginformationandperformingexperiments.Factsbythemselvesarenotscience.AsthemathematicianJulesHenriPoincaresaid,“Scienceisbuiltwithfactsjustasahouseisbuiltwithbricks,butacollectionoffactscannotbecalledscienceanymorethanapileofbrickscanbecalledahouse.” Mostscientistsstartaninvestigationbyfindingoutwhatotherscientistshavelearnedaboutaparticularproblem.Afterknownfactshavebeengathered,thescientistcomestothepartoftheinvestigationthatrequiresconsiderableimagination.Possiblesolutionstotheproblemareformulated.Thesepossiblesolutionsarecalledhypotheses. Inaway,anyhypothesisisaleapintotheunknown.Itextendsthescientist’sthinkingbeyondtheknownfacts.Thescientistplansexperiments,performscalculations,andmakesobservationstotesthypotheses.Withouthypothesis,furtherinvestigationlackspurposeanddirection.Whenhypothesesareconfirmed,theyareincorporatedintotheories. 科学理论 在科学中，理论是对所观察到的相关事件的合理解释。理论通常包含一个虚构的模型， 这个模型帮助科学家构想所观察到的事件是如何发生的。分子运动理论便是我们能找到的一个很好的例子。 在这个理论中，气体被描绘成由许多不断运动的小颗粒组成。一个有用的理论，除了能够解释过去的观测，还有助于预测那些未被观测到的事件。一个理论公开 后，科学家们设计实验来检验这个理论。如果观察证实了科学家的预言，这个理论则得到了验证。如果观察不能证实科学家的预言，科学家就必须进一步的研究。 或许是实验存在错误，或许是这个理论必须被修改或抛弃。科学家除了收集信息和操作实验外还需要想象能