关于美食的英语演讲稿

1/10关于美食的英语演讲稿HealthyDietTherearemanypeoplewhothinkthatwealthisbetterthanhealth.IusedtothinksountilonedayIreadastoryaboutHowardHughes.HewasanAmericanbillionairewhogotanythinghewanted.However,inthelasttwentyyearsofhislife,hishealthbegantodeteriorateandhewasmiserable.Hehadthebestdoctorsandnurses.However,hecouldstillfindnorelief.Irealizedthathealthisworthallthemoneyintheworld.Ifyouhavemillionsofdollarsbutyourhealthispoor,youwillnotbeabletodowhatyouwanttodo.SoIwouldliketosaydonthurtyourselftryingtomakemoneyinsteadoftakingcareofyourbodyandbehappywithwhatyoudohave.Healthismoreimportant.SoIthinkheathisveryimportant.Peoplecandonothingiftheyarealwaysinpoorhealth,letalonehappiness.Nomatterwearerichornot,wecannotignoretheimportanceofhealth.2/10Today，manypeoplecantbeingoodhealth，So，howtokeephealthyisveryimportant.Illsaysomethingaboutfoodandhealth.Moreandmorepeoplearerealizingtheimportanceofgoodhealth.Buthowtokeepfit?Inmyopinion,ahealthydietisveryimportantforyourhealth.Doyouknowwhatahealthydietis?Firstly,youshouldhaveabalanceddiet.Youmaynotlikeeatingvegetables.Youthinktheyarenotsodelicious.Butvegetableshavealotofnutrition.Theyareverygoodforyourhealth.Secondly,youdbettereatregularmeals.Youneedtoeatbreakfast,lunch,anddinnereveryday.Regularmealsthroughoutthedaygiveyouenoughenergytocarryoutyourdailyactivities.Neverskipbreakfast.Itisthemostimportantmealoftheday.Eatbiggermealsearlierintheday.Donthaveabigdinner.Thirdly,mostofyoulikeeatingsnacks.Theymayaffectyourappetite.Besides,toomanysnacksmakeyoufat.Inaword,ifyouwanttobehealthy,youshouldkeepahealthydiet.Itistimeforustodosomethingnow,Ithink.Thatis,weshouldeatthe3/10rightkindsoffood,anddonoteatanyoftheunhealthyfood!Letusdoitrightawaytokeephealth!Letsdoitinsteadoftalkingaboutit.ThatsallIwanttosaytoyouIshallbespeakingtodayaboutBeforewestartourpresentation,letstakeabrieflookatIfyougiveadiettolaboratoryanimalitsverycommonforanimalstogainagoodbitofweightwhengivenaccesstothisdiet.Eveniftheyregivenhealthyfoodatthesametime,theylltendtoignorethehealthyfoodandeatadietlikethis.Andtherearetwopropertiesofthisdietthathelppromoteovereatingandobesityinlaboratoryanimals.Whatwouldyousaythetwofeaturesare?Sugarandiswhatpeopleusuallyguessfirstandthatscorrect,fatisnumbertwo,soyouguysaregoodsofar.Whocanguesswhatthethirdmightbe?Saltisagoodguess,butthatsnottheanswer.Butwhywouldalabanimalseekoutadiet,becomeveryoverweight,becomenutritionallydeficientinsomethingsbecauseitsnoteatingthehealthyfoodstotheextentthatit4/10becomesunhealthy?Thefactisthoselabanimalshaveahard-wiredpreferenceforfoodsthatarehighinfatandhighinsugar,primarilybecauseoftheenergydensitythatthosefoodsbringtoone,theseekingoutfatandsugarisahighlyevolved,adaptiveevolutionarytraitofanimalsandhuman.Todayweregoingtotalkthetwobigonesthatpeopleareusuallyconcernedwith:carbohydratesandfat.Letsstartwithcarbohydrates.Sugars,inotherreusedbythebodyforprettyimmediatearethreeclassesofsugar:monosaccharides,disaccharides,andpolysaccharides.Itsnotsoimportantthatyouknowwhichsugarsfallundereachofthesecategories,butitisimportanttoknowthattherearedifferentcategoriesofsugars.Underthemonosaccharides,glucose,fructoseandgalactosearethesugars.Disaccharides,whereyouhaveseveralsugarspairedtogether,aremaltose,sucrose,andthepolysaccharidesarethecomplexcarbohydrates,andthatsstarch,glycogen,andcellulose.Ifyoulookatsourcesofthesedifferentcarbohydrates,the5/10glucosecomesfromfruit.Thatsnottheonlyplacebutthatsaprimarysourceofit.Youseethelactoseofcoursefrommilk,andthenyougetdowntothecelluloseandstarches,cerealsandvegetablesbecometheprimarysourceofthese.Areweeatingtoomuchortoolittleofthesedifferentclassesofsugars?Well,asyoumightguess,weeattoomuchofthesimplesugarsandthedisaccharidesugarsandweeattoolittleofthecomplexcarbohydrates.Soifyoufollowedadietwhereyouatelessjunkfoodandatemorefruitsandvegetables,forexample,justthosetwolittlerulesyouwouldhelpshiftaroundthisbalanceofsugarsinawaythatwouldbenefithealth.Theressugarinalotoffoodswhereyoudontexpectit.Forexample:peanutbutter.Heresalistofingredientsfromskippypeanutbutterandyouseethatsugaristhesecondmostcommoningredient.Heresanotherexample.Beefstew,youwouldntnecessarilyexpecttofindsugarinbeefstewbutitsthere.Nowitsdownthelistofingredients,itsactuallytowardtheend,butifyoulookatthemarketingofthisandlookatthecanitsays,theres6/10freshpotatoesandcarrots,butactuallytheresmoresugarinthisthanthereiscarrots.Okay,letstalkaboutfatforamoment.Fathastwicethecaloriesperunitweightasproteinandcarbohydrate.Soitsaveryefficientwayofsecuringenergy.Butifoneisnotdeprivedofcalories,thenhavingfatmynotbesohelpful.Therearedifferentkindsoffatthathavedifferentimpactsonhealth.Severalconceptsthatarerelevantinthediscussionoffat:cholesterol,saturation,andtransfat.Firstofall,aredifferentkindsofcholesterol,HDLandLDL.ItwasamajordiscoverywhenscientistsinthelastcenturyfoundthatHDLisgoodandLDLisbad,theHDL,thatsprotectiveagainstthingslikeheartdiseaseandyouwanttohaveahigherlevelofthatandalowerlevelofsaturationisinteresting.Youhearalotaboutsaturatedfatandunsaturatedfat.Asyouknow,unsaturatedfatishealthyandyouwanttohavethisinyourdiet.Transfatshavebecomeareallyinterestingissue.Therearegroupsofpeoplewhohavestudiedtheimpactoftransfatsonhealthforanumberofyears.Theyhavefoundthattransfatswere7/10havingaverynegativeimpactonaretransfats?Theyreunsaturatedfattyacidsthatgetformedwhenfoodsarepartiallyhydrogenated.Whenyouseethatpartiallyhydrogenatedoilsonaningredientlist,thatmeanstherestransfat.Whywouldcompaniesdothis?Whywouldthefoodindustrywanttointroducetransfatinthefirstplace?Well,itchangesthefoodinwaysthatarecommerciallyappealingfortheindustry.Itgivesfoodsalongershelflife.Theytendtostaystableduringdeepfryingandthenthepalatabilitygoesupandthefoodstastebacktotheconceptthattherearegoodandbadfats,ifwelookatthelefthandsidehere,isatableoragraphicshowingthefatsthattendtohavebeneficialimpactsonhealth.Youhavetheunsaturatedfat.Theseafood,oliveoilsandsomenutsarehighintheunsaturatedfats.Sothesekindsofratsarenotnecessarilybad.Thebadfatslooklikethis,andthosearethesaturatedfatsandthetransfat.ThesebadfatsraisetheLDLlevels,thatsnotgoodforyou.Andtheylowertransfatsthatwementionedbeforethatyoucanseelistedoverherefrommargarine,shortenings,8/10deepfriedfoods,alotoffastfoodsandbakedgoodshaveanegativeimpactonhealthaswell.Soitsimportantforthepublichealthtochangetheportioningoffatsoyoumovefrombadtothebetterfatsinthediets.CWhenwetalkaboutfood,therearereallysomanyweintroduceeverykindofthem,Idontthinkitcanbeoverinthisclasseveninthisyear.YSowewilljustintroducesometypicalandpopularfoodinthisPPT.CFrenchfoodsfeatureiswidechoiceofmaterial.Asandwichmightnotsoundliketypical,butitscertainlyworthyofyoursalwaysayummylunchtimemeal!YCroissantkr?santisalsoatypicalfamousFrenchfood.CThemacaroniscommonlyfilledwithbutter-creamorjamfillingsandwichedbetweentwocookies.YFrenchcrepesareusuallyoftwotypes:sweetandsalty.9/10CThenisJapanese.NoodlesareanimportantpartofJapanesefood.YSobanoodlesare