土木工程专业英语.ppt

土木工程专业英语土木工程专业英语Lesson5EnvironmentalEngineering

环境工程Newwordsandphrases:perturbationecosystemsubdisciplinedepletionanaerobicscumgreasecoagulationsedimentationemanatecolloidalfiltrationpesticideherbicidefertilizercentrifugeaquiferimpoundmentozonecarcinogeniceutrophicalgaerunoffrefusedisposal垃圾处理by-product副产品,出乎意料的结果dealwith安排,处理,涉及Environmentalengineeringisabranchofengineeringthatisconcernedwithpollutionbythestructures,machines,systems,andprocessesthatareinvolvedinhumanactivities.环境工程是和结构、机械、系统，以及涉及到人类活动的过程所产生的污染有关的一个工程学的分支。ThedevelopmentofcivilizationhascausedperturbationofmuchoftheEarth’secosystem,resultinginpollutionoftheair,landandwater.文明的发展已经引起许多地球生态系统的紊乱，造成空气、陆地和水的污染。Itisthetaskoftheenvironmentalengineernotonlytodesignsystemstoassuagethispollutionbutalsotoeducatepeopleinprotectingtheirsurroundingsfromadditionalpollution.环境工程师的任务不仅是设计出一些系统来减轻这个污染，而且还要教育人们保护他们周围的环境免遭额外的污染。Thepracticeofenvironmentalengineeringisdividedintovarioussubdisciplines.环境工程专业又被分为了不同的分支学科。Environmentalengineering环境工程Inmanycases,rivers,lakes,andoceanshavebecomepollutedfromdischargesofliquidwastesfromresidential,commercial,andindustrialsources.在许多情况下，河流、湖泊和海洋已经被由住宅、商业、和工业源点排放的废液所污染。Manyofthesebodiesofwaterhavebeenreclaimedbecauseofamovementinthe1970stoconstructnewwastewatertreatmentfacilitiesandtoimproveoldones.许多这些水体已经被回收了是因为20世纪70年代的一场修建新的废水处理设施和改进旧的设施的运动。Bothphysical-chemicalandbiologicalprocessesareusedtoremovefromtheliquidwastewaterstream.可以采用物理化学方法和生物学方法从废液中除去污染物。Watertreatmentanddisposal水处理Itisthisorganicmatterthatcausesadepletionofoxygeninriversandlakes,withconsequentanaerobicconditionsleadingtofishkill