Laughteristhesunthatdriveswinterfromthehumanface.—VictorHugo笑声如阳光，驱走人们脸上的寒冷冬意。——维克多·雨果Helaughsbestwholaughslast.—JohnVanbrugh谁能笑到最后就是真正的赢家。——约翰·范布勒Themostcompletelylostofalldaysisthatonwhichonehasnotlaughed.——Chamfort不曾笑过的日子是白白浪费掉的日子。——尚福尔Agoodlaughissunshineinahouse.—Thackeray令人愉悦的欢笑是房间里的阳光。——萨克雷Laughterisinfectious.Whenlaughterisshared，itunitespeopletogetherandincreaseshappinessandunderstanding.Laughterisapowerfulcureforstress，pain，anddisagreement.Laughterlightensyourburdens，connectsyoutoothers，andkeepsyouconcentratedandreadytoact.Laughterisyourbirthrightandanaturalpartoflife.Babiesbeginsmilingduringthefirstweeksoflifeandlaughoutloudwithinmonthsofbeingborn.LaughterstimulatesyourfullbodyAlaughcanprovideyouwithafullbodywakeupcallthatwillhelpyoufeelenergizedandrefreshed.LaughtermakesyoufeelbetterHaveyoueverbeensuperstressedatworkorschool，maybebecauseeveryoneisbeingmeantodayoryouhaveanexamcomingupthatyou'renotevenclosetoreadyfor，butthenafriendtoldyouahilariousjokeorstorythatmadeyoulaughsohardyoualmostwetyourself？Itisamazinghowmuchbetteranexplosivelaughcanmakeusfeel，especiallyifit'stotallyoutoftheblue!LaughterincreasesyourimmunityNegativestresscauseschemicalreactionsinyourbodythatdecreaseyourimmunity，makingitmorelikelyyouwillgetsick.Aheartylaughfuelsyourimmunesystemwithdisease­fightingpowersthatwillhelpyoustayhealthyandenergetic.LaughterhelpsyoustresslessHaveyoueverbeensofrustratedwithyourdaythatyouwantedtocurlupinaballandcry？Idoubtanyonecanhonestlysay，“No，”tothatquestionbecausewe'veallbeenthere，butwhynotlaughinstead？Howhappyyouareinlifehaslesstodowithhowyouactthanitdoeshowyoureact.[探索发现]1．What'sthereasonforsuperstressatworkorschool?Everyoneisbeingmeantodayoryouhaveanexamcomingupthatyou'renotevenclosetoreadyfor.2．Howlaughterincreasesyourimmunity?Aheartylaughfuelsyourimmunesystemwithdisease­fightingpowers.3．Howmanyadvantagesaboutlaughter?Four.