有关食物的英语演讲稿.doc

有关食物的英语演讲稿 goodmorningeveryone,beforemyspeech,iwanttoaskonequestion,whatdoyoueatthismorning?yeah,foodispresentinourlifeeverytime.sotodaymytopicishowdoweeatoncampus? 1，inchinathereisanoldsaying:breadisthestaffoflife.thechinesemeaningis民以食为天。obviously,itmeansfoodplaysadecisivedisaisivroleinourdailylife,foodsafetyisamatterofprimarypraim?riimportance,theissueiscloselyrelatedtoordinarypeopleshealth. 2,asweknow,thefoodsafetyisaseriousprobleminchina,andoncampus,thematterisalsoexist,andtheunhealthyfoodharmourhealtheveryday.forexample,inthemorning,youbuyadonutd?un?tforbreakfast,andlikely,thedonutismadebydrainagedreinid?oil;andwhenyouhungryyoubuykebabk?b?b,itmaybedealedwithchemicalmaterials.soevenoncampus,wealsoshouldimprovefoodsafetyawareness. 3,theunhealthyfoodseriouslyharmourbody,itcancausedifferentkindsofdiseases,fromaheadachetocancer,thisisnotathreat,someunhealthyfood,containingvariousadditives.andwhichgiveatremendousthreattous.someunhealthyfoodwillmakeusill,suchasdiarrhea,dai?ri?、stomachacheandotherdiseaseofdigestivetract.somefoodadditivesusechemicalmaterialstomakefoodlooksbetter,butitwillcarcinogenic,k:sin?ud?enikinalongtime. 4,duetofoodsafetyisimportantinourlife,sotheresomanythingswaitingforthegovernmenttodo.(问1)first,strengtheningfoodsafetylegislation,led?islei?n,andusetheexperiencesofdevelopedcountries.stronglypunishcriminalforfoodsafety.second,ourgovernmentshouldpromotefoodsafetyknowledge,torisepeoplesofself-protection. 5,whatismore,asapostgraduate,wealsoshoulddomoreonfoodsafety.firstofall,weshouldlearnsomeessentialmonsenseaboutsafetyfood,andlearntorecognizetheunhealthyfoodbyourselves.(问2)second，donotcovetk?vitpettygain，innormalsituation,thefoodpriceisstable,whenyouseeaabnormalprice,becarefull!last,everyoneshouldhaveawarenessofunhealthyfood,raisethesenseofprevention. thoughthefoodsafetysituationisbad,butistillbelievethroughthejointeffortsofgovernmentandallmunities,wefinallywilleatthesecurityfood. 有关食物的英语演讲稿篇2 imastudent.ilikeeggsandcoconut.becauseeggsisverygoodforme.itsveryhealthy.thecoconutisaverysweet.ilikethem. whataboutfruit?ilikebananaverymuch.bananaalwaysgrowsinthewarmarea.itsnicetoeat,anditisgoodforourhealths.likeus,monkeysalsoliketoeatbananas.youcanseethisinthezoo. theyarereallyhealthyanddelicious.ithinkyouwilllikethem,too. 有关食物的英语演讲稿篇3 Ishallbespeakingtodayabout Beforewestartourpresentation,letstakeabrieflookat Ifyougiveadiettolaboratoryanimalitsverymonforanimalstogainagoodbitofweightwhengivenaesstothisdiet.Eveniftheyregivenhealthyfoodatthesametime,theylltendtoignorethehealthyfoodandeatadietlikethis.Andtherearetwopropertiesofthisdietthathelppromoteovereatingandobesityinlaboratoryanimals.Whatwouldyousaythetwofeaturesare?Sugarandfat.Sugariswhatpeopleusuallyguessfirstandthatscorrect,fatisnumbertwo,soyouguysaregoodsofar.Whocanguesswhatthethirdmightbe?Saltisagoodguess,butthatsnottheanswer.Butwhywouldalabanimalseekoutadiet,beeveryoverweight,beenutritionallydeficientinsomethingsbecauseitsnoteatingthehealthyfoodstotheextentthatitbeesunhealthy?Thefactisthoselabanimalshaveahard-wiredpreferenceforfoodsthatarehighinfatandhighinsugar,primarilybecauseoftheenergydensitythatthosefoodsbringtoone,theseekingoutfatandsugarisahighlyevolved,adaptiveevolutionarytraitofanimalsandhuman. Todayweregoingtotalkthetwobigonesthatpeopleareusuallyconcernedwith:carbohydratesandfat. Letsstartwithcarbohydrates.Sugars,inotherwords.Theyreusedbythebodyforprettyimmediateenergy.Therearethreeclassesofsugar:monosaharides,disaharides,andpolysaharides.Itsnotsoimportantthatyouknowwhichsugarsfallundereachofthesecategories,butitisimportanttoknowthattherearedifferentcategoriesofsugars.Underthemonosaharides,glucose,fructoseandgalactosearethesugars.Disaharides,whereyouhaveseveralsugarspairedtogether,aremaltose,sucrose,andlactose.Thenthepolysaharidesaretheplexcarbohydrates,andthatsstarch,glycogen,andcellulose.Ifyoulookatsourcesofthesedifferentcarbohydrates,theglucoseesfromfruit.Thatsnottheonlyplacebutthatsaprimarysourceofit.Youseethelactoseofcoursefrommilk,andthenyougetdowntothecelluloseandstarches,cerealsandvegetablesbeetheprimarysourceofthese.Areweeatingtoomuchortoolittleofthesedifferentclassesofsugars?Well,asyoumightguess,weeattoomuchofthesi-mp-lesugarsandthedisaharidesugarsandweeattoolittleoftheplexcarbohydrates.Soifyoufollowedadietwhereyouatelessjunkfoodandatemorefruitsandvegetables,forexample,justthosetwolittlerulesyouwouldhelpshiftaroundthisbalanceofsugarsinawaythatwouldbenefithealth.Theressugarinalotoffoodswhereyoudontexpectit.Forexample:peanutbutter.Heresalistofingredientsfromskippypeanutbutterandyouseethatsugaristhesecondmostmoningredient.Heresanotherexample.Beefstew,youwouldntnecessarilyexpecttofindsugarinbeefstewbutitsthere.Nowitsdownthelistofingredients,itsactuallytowardtheend,butifyoulookatthemarketingofthisandlookatthecanitsays,theresfreshpotatoesandcarrots,butactuallytheresmoresugarinthisthanthereiscarrots. Okay,letstalkaboutfatforamoment.Fathastwicethecaloriesperunitweightasproteinandcarbohydrate.Soitsaveryefficientwayofsecuringenergy.Butifoneisnotdeprivedofcalories, thenhavingfatmynotbesohelpful.Therearedifferentkindsoffatthathavedifferentimpactsonhealth.Severalconceptsthatarerelevantinthediscussionoffat:cholesterol,saturation,andtransfat.Firstofall,cholesterol.Therearedifferentkindsofcholesterol,HDLandLDL.ItwasamajordiscoverywhenscientistsinthelastcenturyfoundthatHDLisgoodandLDLisbad,theHDL,thatsprotectiveagainstthingslikeheartdiseaseandyouwanttohaveahigherlevelofthatandalowerlevelofHDL.Thesaturationisinteresting.Youhearalotaboutsaturatedfatandunsaturatedfat.Asyouknow,unsaturatedfatishealthyandyouwanttohavethisinyourdiet.Transfatshavebeeareallyinterestingissue.Therearegroupsofpeoplewhohavestudiedtheimpactoftransfatsonhealthforanumberofyears.Theyhavefoundthattransfatswerehavingaverynegativeimpactonhealth.Whataretransfats?Theyreunsaturatedfattyacidsthatgetformedwhenfoodsarepartiallyhydrogenated.Whenyouseethatpartiallyhydrogenatedoilsonaningredientlist,thatmeanstherestransfat.Whywouldpaniesdothis?Whywouldthefoodindustrywanttointroducetransfatinthefirstplace?Well,itchangesthefoodinwaysthataremerciallyappealingfortheindustry.Itgivesfoodsalongershelflife.Theytendtostaystableduringdeepfryingandthenthepalatabilitygoesupand