没问题,字数偏多,望谅解.可能修辞比较专业,望修改得简单一点.

　　BigBenisthenicknameforthegreatbelloftheclockatthenorthendofthePalaceofWestminsterinLondon,andisgenerallyextendedtorefertotheclockortheclocktoweraswell.Itisthelargestfour-facedchimingclockandthethird-tallestfree-standingclocktowerintheworld.Itcelebratedits150thanniversaryon31May2009,duringwhichcelebratoryeventstookplace.Theerectingofthetowerwascompletedon10April1858.TheclocktowerhasbecomeoneofthemostprominentsymbolsofbothLondonandEngland,oftenintheestablishingshotoffilmssetinthecity.

　　ThepresentClockTowerwasraisedasapartofCharlesBarry'sdesignforanewpalace,aftertheoldPalaceofWestminsterwaslargelydestroyedbyfireonthenightof16October1834.ThenewParliamentwasbuiltinaNeo-gothicstyle.AlthoughBarrywasthechiefarchitectofthePalace,heturnedtoAugustusPuginforthedesignoftheClockTower,whichresemblesearlierPugindesigns,includingoneforScarisbrickHall.ThedesignfortheClockTowerwasPugin'slastdesignbeforehisfinaldescentintomadnessanddeath,andPuginhimselfwrote,atthetimeofBarry'slastvisittohimtocollectthedrawings:"IneverworkedsohardinmylifeforMrBarryfortomorrowIrenderallthedesignsforfinishinghisbelltower&itisbeautiful."ThetowerisdesignedinPugin'scelebratedGothicRevivalstyle,andis96.3metres(316ft)high(roughly16stories).

　　Thebottom61metres(200ft)oftheClockTower'sstructureconsistsofbrickworkwithsandcolouredAnstonlimestonecladding.Theremainderofthetower'sheightisaframedspireofcastiron.Thetowerisfoundedona15-metre(49ft)squareraft,madeof3-metre(9.8ft)thickconcrete,atadepthof4metres(13ft)belowgroundlevel.Thefourclockdialsare55metres(180ft)aboveground.Theinteriorvolumeofthetoweris4,650cubicmetres(164,200cubicfeet).

　　Despitebeingoneoftheworld'smostfamoustouristattractions,theinteriorofthetowerisnotopentooverseasvisitors,thoughUnitedKingdomresidentsareabletoarrangetours(wellinadvance)throughtheirMemberofParliament.However,thetowerhasnolift,sothoseescortedmustclimbthe334limestonestairstothetop.

　　Becauseofchangesingroundconditionssinceconstruction(notablytunnellingfortheJubileeLineextension),thetowerleansslightlytothenorth-west,byroughly220millimetres(8.66in)attheclockdials,givinganinclinationofapproximately1/250.Duetothermaleffectsitoscillatesannuallybyafewmillimetreseastandwest.

　　Please，翻译下下

　　全篇具体翻译有点不情愿啊，确实没时间了。大概说一下吧，第一段是对大本钟历史的介绍，第二段是对大本钟造型来历的介绍，第三段是对大本钟结构的介绍，第四段是对大本钟工作（发音）情况的介绍。不过用词比较专业，如果你是拿来做普通的中学英语作文的话，建议你改稍微简化一点。或者你直接上交也无所谓。