宇航员试饮尿液循环水一托福阅读机经背景.docx

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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,"clickeddrinkingbagsandtoastedNASAworkersonthegroundwhoweresippingth

2、eirownversionofrecycleddrinkingwater."Thetasteisgreat,"AmericanastronautMichaelBarrattsaid.ThenasRussianGennadyPadalkatriedtocatchlittlebubblesoftheclearwaterfloatinginfrontofhim,Barrattcalledthetaste"worthchasing."Hesaidthewatercamewithlabelsthatsaid:"drinkthiswhenre

3、alwaterisover200milesaway."TheurinerecyclingsystemisneededforastronautoutpostsonthemoonandMars.ItalsowillsaveNASAmoneybecauseitwon'thavetoshipupasmuchwatertothestationbyspaceshuttleorcargorockets.It'salsocrucialasthespacestationisabouttoexpandfromthreepeoplelivingonbo

4、ardtosix.TherecyclingsystemhadbeenbroughtuptothespacestationlastNovemberbyspaceshuttleEndeavour,butitcouldn'tbeuseduntilsamplesweretestedbackonEarth.Thethree-mancrewstoodholdingtheirdrinksandcongratulatedengineersintwoNASAcentersthatworkedonthesystem."Thisissomethingt

5、hathadbeenthestuffofsciencefiction,"Barrattsaidbeforetakingasip.NASAdeputyspaceshuttlemanagerLeRoyCaincalledit"ahugemilestone."Thenewsystemtakesthecombinedurineofthecrewfromthetoilet,movesittoabigtank,wherethewaterisboiledoff,andthevaporcollected.Therestofcontaminants

6、isthrownaway,saidMarybethEdeen,thespacestation'snationallabmanagerwhowasinchargeofthesystem.Thewatervaporismixedwithwaterfromaircondensation,thenitgoesthroughfilters.Whensixcrewmembersareaboarditcanmakeaboutsixgallonsfromurineinaboutsixhours.ThetechnologyNASAdeveloped

7、forthissystemhasalreadybeenusedforquickwaterpurificationafterthe2004Asiantsunami,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

8、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，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