英语翻译
TheTowerofPisawasbuilttobethemostbeautifulbelltowerinallofItaly.ItisthebelltowerforPisaCathedral.However,notonlyisthemarbletowerbeautiful,itisperhapsthetowerintheworld.Itleanstoonesideandlookslikeitisgoingtofallover.
ThebuildingofthetowerbeganinAugust1173andtooknearlutwohundredyearstocomplete.Nobodyiscertainwhodesignedthetower,butformanyyearsitwassaidthatBonannoPisanowasthearchitect.In1319,allthefloorswerefinishedandyearslater,workeventuallybeganonthebellchamberatthetop.Itwasoffciallyopenedafternearly200yearsofconstruction.Thetowerhaseightfloors.Ilis54.5metrestallwith294stepsuptothebellchamber.Fromthetop,thereisaverybeautifulview.Italianscientist,Galileo,oncedidhisfamousexperimentsaboutgravityandfallingobjectsfronthetopofthetower.
Whydoesthetowerlean?Infact,itwasalreadyleaningwhiletheywerebuildingit.Assoonasthreefloorshadbeenbuilt,by1178,itbegantoleanasthegroundbeneathitsank.Thebuilderstriedtomakethetowerstrauggeagainastheyaddedmorefloors,buttheleanonlygotworseasthetowergrew.Itcontinuedtoleanbyabout1millimetreeveryyearuntilfinally,on7January1990,itwasclosedtotheoublicFortenyears,therescueofthetowerwasaseriousproblem.Thetopwasleaningoverby5metrestothesouthandifitsmovementwasnotstopped,thetowerwouldonedayfallover.Measurementstakenin1911estimatedthattheowerwouldcollapseby2050,ifnotsooner.After10yearsofhardwork,itwasofficiallyreopenedon16June2001.However,itwasnotopenedtopublicuntiltheendof2001andevennow,thenumberofvisitorisrestricted.Itisnowsafeforthenext300yearsbecauseengineershavereducedtheleanby50centimetresgiveitthesameleanthatithadin1838
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