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1、Unit1GreatscientistsⅠ.阅读理解(2018·天津)There’sanewfrontierin3Dprintingthat’sbeginningtoeintofocus:food.Recentdevelopmenthasmadepossiblemachinesthatprint,cook,andservefoodsonamassscale.Andtheindustryisn’tstoppingthere.FoodproductionWitha3Dprinter,acookcan
2、printplicatedchocolatesculpturesandbeautifulpiecesfordecorationonaweddingcake.Noteverybodycandothat—ittakesyearsofexperience,butaprintermakesiteasy.ArestaurantinSpainusesaFoodinito“re-createformsandpieces”offoodthatare“exactlythesame,”freeingcookstop
3、leteothertasks.Inanotherrestaurant,allofthedishesanddessertsitservesare3D-printed,ratherthanfarmtotable.Sustainability(可持续性)Theglobalpopulationisexpectedtogrowto9.6billionby2050,andsomeanalystsestimatethatfoodproductionwillneedtoberaisedby50percentto
4、maintaincurrentlevels.Sustainabilityisbeinganecessity.3Dfoodprintingcouldprobablycontributetothesolution.Someexpertsbelieveprinterscouldusehydrocolloids(水解胶体)fromplentifulrenewableslikealgae(藻类)andgrasstoreplacethefamiliaringredients(烹饪原料).3Dprinting
5、canreducefueluseandemissions.Grocerystoresofthefuturemightstock“food”thatlastsyearsonend,freeingupshelfspaceandreducingtransportationandstoragerequirements.NutritionFuture3Dfoodprinterscouldmakeprocessedfoodhealthier.HodLipson,aprofessoratColumbiaUni
6、versity,said,“Foodprintingcouldallowconsumerstoprintfoodwithcustomizednutritionalcontent,likevitamins.Soinsteadofeatingapieceofyesterday’sbreadfromthesupermarket,you’deatsomethingbakedjustforyouondemand.”ChallengesDespiterecentadvancementsin3Dfoodpri
7、nting,theindustryhasmanychallengestoovere.Currently,mostingredientsmustbechangedtoapaste(糊状物)beforeaprintercanusethem,andtheprintingprocessisquitetime-consuming,becauseingredientsinteractwitheachotherinveryplexways.Ontopofthat,mostofthe3Dfoodprinters
8、nowarerestrictedtodryingredients,becausemeatandmilkproductsmayeasilygobad.Someexpertsareskepticalabout3Dfoodprinters,believingtheyarebettersuitedforfastfoodrestaurantsthanhomesandhigh-endrestaurants.【语篇导读】本文是一篇说明文。文章主要介绍了一项新的3D食物打印技术,包括食物打印的省时高效的特点、所
