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ID:27232098
大小:2.64 MB
页数:5页
时间:2018-12-02
《宇航员试饮尿液循环水一托福阅读机经背景.docx》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、智课网TOEFL备考资料宇航员试饮尿液循环水一托福阅读机经背景AstronautsaboardthespacestationcelebratedaspacefirstonWednesdaybydrinkingwaterthathadbeenrecycledfromtheirurine,sweatandwaterthatcondensesfromexhaledair.Theysaid"cheers,"clickeddrinkingbagsandtoastedNASAworkersonthegroundwhoweresippingtheirow
2、nversionofrecycleddrinkingwater."Thetasteisgreat,"AmericanastronautMichaelBarrattsaid.ThenasRussianGennadyPadalkatriedtocatchlittlebubblesoftheclearwaterfloatinginfrontofhim,Barrattcalledthetaste"worthchasing."Hesaidthewatercamewithlabelsthatsaid:"drinkthiswhenrealwateriso
3、ver200milesaway."TheurinerecyclingsystemisneededforastronautoutpostsonthemoonandMars.ItalsowillsaveNASAmoneybecauseitwon'thavetoshipupasmuchwatertothestationbyspaceshuttleorcargorockets.It'salsocrucialasthespacestationisabouttoexpandfromthreepeoplelivingonboardtosix.Therec
4、yclingsystemhadbeenbroughtuptothespacestationlastNovemberbyspaceshuttleEndeavour,butitcouldn'tbeuseduntilsamplesweretestedbackonEarth.Thethree-mancrewstoodholdingtheirdrinksandcongratulatedengineersintwoNASAcentersthatworkedonthesystem."Thisissomethingthathadbeenthestuffof
5、sciencefiction,"Barrattsaidbeforetakingasip.NASAdeputyspaceshuttlemanagerLeRoyCaincalledit"ahugemilestone."Thenewsystemtakesthecombinedurineofthecrewfromthetoilet,movesittoabigtank,wherethewaterisboiledoff,andthevaporcollected.Therestofcontaminantsisthrownaway,saidMarybeth
6、Edeen,thespacestation'snationallabmanagerwhowasinchargeofthesystem.Thewatervaporismixedwithwaterfromaircondensation,thenitgoesthroughfilters.Whensixcrewmembersareaboarditcanmakeaboutsixgallonsfromurineinaboutsixhours.ThetechnologyNASAdevelopedforthissystemhasalreadybeenuse
7、dforquickwaterpurificationafterthe2004Asiantsunami,Edeensaid."Wearehappytohavethiswaterworkthroughthesystem—we'rehappytohaveitworkthroughoursystems,"Barrattsaid.国际空间站的宇航员于本周三庆祝他们喝上了利用尿液、汗液以及蒸汽制出的水,这是太空史上的一大创举。他们用饮水袋碰杯庆祝,高喊“干杯”,与也在饮用循环水的美国宇航局地面工作人员举杯共庆。美国宇航员迈克尔•巴拉特说:“味道好极了,
8、值得品尝”。当时俄罗斯宇航员杰纳迪•帕达尔卡正试图抓住在他面前漂浮的循环水小气泡。他开玩笑道,水的商标应该这样写:“当真正的水远在200多英里之外时,就请享用它吧。”对身处月球和
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