China’sfirstmoonrover，Yutu，orJadeRabbit，separatedfromthelanderearlyonSunday，Decemberl5，2013，severalhoursaftertheChang’e-3probe(探测器)soft-landedonthelunarsurface．Thel40kgsix-wheeledrovertouchedthelunarsurfaceat4：35a．m．，leavingdeeptraceonthelooselunarsoil.Theprocesswasrecordedbythecameraonthelanderandtheimagesweresenttotheearth，accordingtotheBeijingAerospaceControlCenter．
Aftertheseparation，theroverandlanderwilltakephotosofeachotherandstarttheirownscientificexplorations.Engineersmadefinalchecksoftheenvironmentofthelandingsite，thesituationoftheprobeandsentsignalsofseparationtoChang’e-3．
Yutuonthetopoftheprobe，extendeditssolarpanelandstartedtodriveslowlytothetransfermechanism(机械装置)at3：10．Thetransfermechanismunlockedat4：06withonesidereachingthemoon’ssurface，allowingtherovertodescendtothesurfacefollowingaladdermechanism．
Chang’e-3landedonthemoon’sSinusIridum，ortheBayofRainbows，at9：11p．m．Saturday，makingChinathethirdcountryintheworldtocarryoutsucharovermissionaftertheUnitedStatesandformerSovietUnion．
InancientChinesemythology，YutuwasthewhitepetrabbitofthelunargoddessChang’e．Thenamefortheroverwasselectedfollowinganonlinepollthatcollectedseveralmillionvotesfrompeoplearoundtheworld．
Therover，1.5meterslongwithitstwowingsfolded，1minwidthandl．1minheight，isahighlyefficientrobotcontrolledbythecommandcenterfromtheearth．Itwillfacechallengesincludingtemperaturedifferencesofmorethan300degreesCelsiusonthemoon．
Yutuwillsurveythemoon’sgeologicalstructureandsurfacesubstancesandlookfornaturalresourcesforthreemonths，whilethelanderwillconductin-situ(现场)explorationrightatitslandingsiteforoneyear．
【小题1】What’sthepassagemainlyabout?
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