很高兴为您 　　Itisknowntousthatthepoliticalsystemvariesfromcountrytocountrydependingon 　　itsdifferentnationalcondition,suchastheconstitutionalmonarchyofUKandthePeople'sCongresssystemofChina.Besides,theSeparationoftheThreePowersisthebiggest 　　characteristicofAmericanpolitics.AccordingtotheU.S.Constitutiondeclaredthatthe 　　governmentwasdividedintothreedifferentbranchesincludingalegislative,anexecutive 　　andajudiciary,inaccordancewiththeideaofseparationofpower. 　　Eachownsitsindependentpowerandcharacter.Thiskindofrpoliticalsystemenjoysbothgreatadvantagesanddisadvantages. 　　Firstly,theycanactindependently.Thisassuretheirindependenceandjustice. 　　Secondly,theycansuperviseandbalanceeachotherwhichconcludesthatnoneofthemcanbetoopowfultosurpasstheothers. 　　Notonlydoeseachbranchofthegovernmenthaveparticularpowerseachbranchhascertainpowersovertheotherbranches.Thisisdonetokeepthembalancedandtopreventonebranchformevergainingtoomuchpower,whichpracticesthesystemofchecks-and-balances. 　　However,suchchecksandbalanceswillabsolutelyresultsinlowefficiencyofthegoverment.Resourcesandpowersaredivided.Threepowersmaysometimesstrugglewitheachotherandcausethefailureofsomeusefulactionsduetodepartmentbenefit. 　　Aboveall,thoughwithsomedisadvantages,westillbelievethattheideaofseparationandthesystemofchecks-and-balancesdohavecontributedalottothedevelopmentofAmericaasmainprinciplewhenthegovernmentoperates.Itisakindofunprecedentedandinnovativesystem. 　　根据自己的理解,手工写就! 　　------------------------------- 　　★倾心解答★愿您满意★ 　　★欢迎追问★敬请采纳★ 　　-------------------------------