英语翻译
Theybabyisjustonedayoldandhasnotyetlefthospital.Sheisquietbutalert(警觉).Twentycentimetersfromherfaceresearchershaveplacedawhitecardwithtwoblackspotsonit.Shestaresatitcarefully.Aresearcherremovesthecardandreplacesitbyanother,thistimewiththespotsdifferentlyspaced.Asthecardschangefromonetotheother,hergaze(凝视)startstoloseitsfocus-untilathird,withthreeblackspots,ispresented.Hergazereturns;shelooksatitfortwiceaslongasshedidatthepreviouscard.Canshetellthatthenumbertwoisdifferentfromthree,just24hoursaftercomingintotheworld?
请标准翻译(不要机器翻译的),