一个英语句子的解释------------务必高手帮忙Theybabyisjustonedayoldandhasnotyetlefthospital.Sheisquietbutalert（警觉）.Twentycentimetersfromherfaceresearchershaveplacedawhitecardwithtwoblackspotsonit.S

　　一个英语句子的解释------------务必高手帮忙

　　Theybabyisjustonedayoldandhasnotyetlefthospital.Sheisquietbutalert（警觉）.Twentycentimetersfromherfaceresearchershaveplacedawhitecardwithtwoblackspotsonit.Shestaresatitcarefully.Aresearcherremovesthecardandreplacesitbyanother,thistimewiththespotsdifferentlyspaced.Asthecardschangefromonetotheother,hergaze（凝视）startstoloseitsfocus-untilathird,withthreeblackspots,ispresented.Hergazereturns；shelooksatitfortwiceaslongasshedidatthepreviouscard.Canshetellthatthenumbertwoisdifferentfromthree,just24hoursaftercomingintotheworld?

　　Ordonewbornssimplyprefermoretofewer?【Thesameexperiment,butwiththreespotsshownbeforetwo,showsthesamereturnofinterestwhenthenumberofspotschanges】.Perhapsitisjustthenewness?Whenslightlyolderbabieswereshowncardswithpicturesofobjects（acomb,akey,anorangeandsoon）,【changingthenumberofobjectshadaneffectseparatefromchangingtheobjectsthemselves.】

　　1、第一个【】里的句子中butwiththreespotsshownbeforetwo是插入成分吗?如何翻译?

　　2、第二个【】例的句子中hadaneffectseparate中的separate是名词吗?如何翻译?