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英译汉!谢绝机器入内Passengersintaxis,buses,andcarsallbreathemorepollutionthancyclistsandpedestrians,anewstudyshows.Researchersmeasuredlevelsoflevelsofultra-fine(极细微的),traffic-producedpollutionparticles(粒子
更新时间: 2025-08-28 16:31:25
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英译汉!谢绝机器入内

Passengersintaxis,buses,andcarsallbreathemorepollutionthancyclistsandpedestrians,anewstudyshows.Researchersmeasuredlevelsoflevelsofultra-fine(极细微的),traffic-producedpollutionparticles(粒子的)onbusyLondonstreetsusinganewlydevelopedparticlecounterfittedwithavideorecorder.

Theequipmentallowedthemtomatchparticlelevelswitheachofthefivemodesoftransport.Theyalsocouldidentifywhatactivitiesandbehaviorsleadtothehighestexposures(暴露).Onaverage,taxipassengerswereexposedtojustunder100,000andpeopleincarsabout40,000.

Pedestriansandbicyclists,meanwhile,wereexposedtocountsofjust5,000and8,000,respectively.Ultra-fineparticlesaresosmallthatlargeamountscanbebreathedinasinglebreath,afterwhichtheycansettleinthelungsanddamagecells.

WouldtheresultsholdtrueinNewYorkCityorelsewhere?Wegenerallyfoundthatthetrendssuchaspedestrianshavingthelowestexposuresandthein-vehicleexposuresbeingmuchhighertobecommonacrossdifferentcountries,”studyco-authorSurbjitKaurofImperialCollegeLondonsaid,“However,theconcentrations(浓度)dovaryduetodifferentlocalconditions,suchastraffic,meteorology,buildinglayout,andconfiguration.“

Peoplesittinginavehicleinthemiddleofheavytrafficaredirectlyinthepathofthepollutantsource---othervehicle’smufflers.Pollutionincarsislessthaninothervehiclesmostlikelybecausecarsgenerallyspendlesstimeintrafficthantaxisandbuses,Also,privatecarstendtobecleanertobeginwith.

Bikersstickmostlytotheouteredgesofthestreet,wherepollutionlevelsarelower.Peopleonthesidewalkareevenfurtheraway.

池成忠回答:
  研究人员利用一个配有录像机的最新发明的粒子计数器在伦敦闹区测量了诸多不同层次的、超细的、由交通导致的污染粒子.研究发现的士、巴士、小车乘客比骑自行车的人和行人吸入的污染要多.该设备允许研究人员与5类运输...
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