ThestoryissetinPasadena,California,theTVseriesiscenteredaroundfivecharacters:tworoommateCaltech(加州理工学院)geniuses,theoreticalphysicistSheldonandexperimentalphysicistLeonard;theirneighboracrossthehallPenny,anattractiveblondebeauty;andtheirfriendsHoward,anAerospaceengineer(航空工程师)andRajesh,aparticleastrophysicistpostdoc(粒子天体物理学家博士)Sheldon:OriginallyfromEastTexas,HisIQisashighas187,buthisEQisverylow.HeisAtheoreticalphysicistfocusingonstringtheory(弦理论),hepossessesamaster'sdegree,twoPh.Ds.Hewasachildgeniuswhobegancollegeattheageof11(aftercompletingthefifthgrade),startedgraduatestudiesat14,andearnedhisfirstPh.D.at16.Hehasalotofweirdhabits.Heexhibitsalackofunderstandingofirony,sarcasm,andhumor;heisalsouninterestedinmanyoftheromanticthings.heisveryarrogant,andrefusetobelievethatnooneissmarterthanhimintheworld.It’sfunthathecan’trealizehisarrogance.Ontheotherside,heisforthrightandsincere,whichalwaysmakeyoulovehimverymuch.ItsoundscrazythatamanlikeSheldonhasagirlfriend.AmyFarrahFowler:shefirstappearedinthethirdseason,sheisaneurobiologist,sheisSimilartoSheldon.shelaterbecameSheldon'sgirlfriendinthefourthseason,theirfriendscalledthem“shamy”.LeonardisanexperimentalphysicistwithanIQof173whoreceivedhisPh.D.whenhewas24yearsold.Hepossessesamaster’sdegreeandaPh.D.Hisparentsareallscientists.HesharesanapartmentwithhiscolleagueandfriendSheldonCooper.HeistheonlyonewhocantolerateSheldon.Comparedtoseveralothergenius,Heisthemostrealisticone.Hischaracteriskind,shyandwarm-hearted.TheaffectingthingisapotentialromancebetweenhimandneighborPenny.Penny–Sheistheattractive,blondebeautywholivesacrossthehallfromSheldonandLeonard.Differentfromthem,shejustgraduatedfromCommunitycollege.SoSheldonoftenlaughsatherignorance.Shehasaspirationstobecomeanactress.AsanAmericanstandardsweetgirl,sheleaveshomeforherstardream,butsheisnotsuccessfulinstagecareer.Topaythebills,sheworksasawaitressatTheCheesecakeFactory.DifferentfromSheldonandLeonard’socialanxietydisorder,sheisgoodatsocialcontact,soshehadmanyhandsomeboyfriendsbefore.ShelovesLeonard.Andtheyfellinloveinthethirdseason.Afterwards,becauseofsomereasons,theybrokeupmanytimes.Butfinallytheyannouncedtheirengagementintheseventhseason.HowardWolowitzHeworksasanaerospaceengineer.HeisJewish,andliveswithhismother.UnlikeSheldon,Leonard,andRaj,HowardlacksaPh.D.buthehasamaster'sdegreeinEngineeringfromMIT(麻省理工)andTheapparatushedesignsareactuallybuiltandlaunchedintospace.hiswifeisBernadetteBernadette:Sheisamicrobiologistandthesweetgirl.ShealsoworksasawaitressatTheCheesecakeFactory.So,sheisPenny’friend.becauseofPenny,BernadettemadetheacquaintanceofHoward.Then,theyfellinlove.Finally,theygotmarriedinthefifthseason.RajeshKoothrappali–Rajesh,whooriginallycomesfromIndia,worksasaparticleastrophysicistatCaltech.Maybeyouwillthinkheispoor.Onthecontrary,heisfromaveryrichfamily.BecausehisfatherisadoctorinIndia.Heisveryshyaroundwomenandisphysicallyunabletotalktothemunlesshedrinksalcohol.Soheistheonlyonewhodon’thaveagirlfriend