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Unit one Environmental Engineering环境工程What is this book about？这本书是关于什么的？The objective of this book is to introduce engineering and science students to the interdisciplinary study of environment problems；their cause，why they are of concern，and how we can control them. The book includes: 这本书的目的是使理工科的学生了解跨学科间的研究环境问题;它们的起因，为什么它们受到关注，以及我们怎样控制它们。
这本书包括：●Description of what is meant by environment and environmental systems描述环境和环境系统意味着什么●Information on the basic causes of environmental disturbances关于引起环境干扰基础原因的基本信息●Basic scientific knowledge necessary to understand the nature of environmental problems and to be able toquantify them理解环境问题本质，并能够定量计算它们所必要的基本科学知识●Current state of the technology of environmental control in its application to water，air and pollutionproblems目前适用于水，空气和环境污染问题的环境控制技术的现状●Considerable gaps in our current scientific knowledge of understanding and controlling many of thecomplex interactions between human activities and nature我们目前的科学知识在理解和控制人类活动和自然之间复杂的相互作用的科学知识上存在相当大的缺陷●Many environmental problems which could be eliminated or reduced by the application of currenttechnology，but which are not dealt with because of society’s lack of will to do so，or in many instance because of a lack of resources to do so.许多环境问题可以应用现有技术消除或减少，但没有得到处理是因为社会缺乏这样做的意愿，或者像许多例子那样因为缺乏资源。
life expectancy ：耐用期限，平均寿命poverty-stricken ：贫穷的，贫困的，贫乏的smog-laden air ：烟雾弥漫的天空，烟雾缭绕的空气，阴霾天气global conditions ：全球状况haves and have-nots ：富人和穷人underprivileged ：社会地位低下的，相对贫困的，生活水平低下的，弱势的savanna ：热带大草原，稀树草原predator ：食肉动物，捕食者environmental disruptions ：环境破坏，环境失调农药—pesticide / agricultural chemicals (including: pesticide, germicide, herbicide)化肥—chemical fertilizer 有机废物—organic wastes微生物—microorganism / microbe 衰减—attenuation阻滞的—retardant / blocking 稀释—dilution添加剂—additive 合成塑料—synthetic plastic 再生—regenerationUnit 4Precision and accuracy 精确度和准确度bulk collection 大量的搜集matric material 基体材料ananlytical sequence 分析结果Multivariate statistics 多变量的统计interactive effect 相互间的影响insofar 在...的范围overall analytical scheme 整体分析计划灵敏度sensitivity 采样sample collection 真实时间real time样品欲处理pretreatment of the sample 稳定性stability曲线拟合curve-fitting 吸附adsorb adsorption 累积accumulate accumulation 分析评价analytical evaluation 物理分离physical separation因次图dimension graph 标准方差standard varianceUnit 5primary pollutant 一次大气污染物secondary pollutant 二次大气污染物air stagnation 空气流动停滞，大气停滞nitrous oxide 一氧化二氮(N2O)nitric oxide 一氧化氮(NO) nitrogen dioxide 二氧化氮(NO2)soot 煤烟dust 灰尘smog 烟雾ozone 臭氧herbicide 除草剂pesticide 杀虫剂/ 农药正常浓度normal concentration 严重污染的serious polluted / heavily polluted决定因素determining factor 光化学氧化物photochemical oxidant液体微滴liquid droplet 放射性物质radioactive substance不完全氧化incomplete oxidization / incomplete combustion含硫的sulfur-containing 风化wind erosion / weathering 汽车尾气automobile exhaustUnit 7出口outlet 多管高效旋风分离器multitube high-efficiency cyclone合成纤维synthetic fabric 捕集效率collection efficiency机械洗涤mechanical scrubbing 压力降pressure drop焚化炉incinerator 气体离子gas ion捕集板collection surface 碳黑carbon black尾气off-gas 可应用性applicability 工业规模full-scale 土壤床soil bed生物过滤器biofilter 固定资本fixed capital 易生物降解的easily biodegraded VOC 挥发性有机化合物APC 大气污染控制Regulatory program 调整项目Financial support 财政支持Operating cost 操作成本Biodegradation capacity 生物降解能力Environmental media 环境介质Biological 生物学的Technologies 技术、工艺Inorganic air pollutants 无机大气污染物Unit 10treatment facilities 处理设备municipality 市政当局, 自治市population equivalent 人口当量basement flooding 地下室浸水per capita per day 每人每天runoff 排水domestic sewage 生活污水type of terrain 地形种类Unit 12land disposal 掩埋处置fecal coliform 粪大肠菌群stringent effluent requirement 严格的废水排放要求assimilation capacity 同化能力practical outlets 可行的排出途径，现实出路aquatic life 水生生物detrimental to human health 对人体健康有害的endogenous phase 内源〔生长〕期Unit 13flow monitoring 流量监测equipment age and reliability 装备老化及其可靠性mechanistic facilities 机械设备microbial activity 微生物活性activated sludge 活性污泥controlling respiration 控制呼吸oxidation ditches 氧化沟on-line automation 在线自动〔监测〕手动控制operator control/ manual control 最优化minimize the effects微处理器microprocessor 统计分析statistical analysis质量衡算mass balance 动力学dynamics氧化还原oxidation and reduction /redox 停留时间residence time模拟simulation 参数parameter 水解hydrolysis 积分integralUnit 1 环境工程本书的内容：本书的目的是使工科和理科学生对环境问题的跨学科的研究有所了解：环境问题的起因，环境问题受关注的原因，如何控制环境问题。
Unit one Environmental Engineering环境工程What is this book about？这本书是关于什么的？The objective of this book is to introduce engineering and science students to the interdisciplinary study of environment problems；their cause，why they are of concern，and how we can control them. The book includes:这本书的目的是使理工科的学生了解跨学科间的研究环境问题;它们的起因，为什么它们受到关注，以及我们怎样控制它们。
这本书包括：●Description of what is meant by environment and environmental systems描述环境和环境系统意味着什么●Information on the basic causes of environmental disturbances关于引起环境干扰基础原因的基本信息●Basic scientific knowledge necessary to understand the nature of environmental problems and to be able toquantify them理解环境问题本质，并能够定量计算它们所必要的基本科学知识●Current state of the technology of environmental control in its application to water，air and pollution problems目前适用于水，空气和环境污染问题的环境控制技术的现状●Considerable gaps in our current scientific knowledge of understanding and controlling many of the complexinteractions between human activities and nature我们目前的科学知识在理解和控制人类活动和自然之间复杂的相互作用的科学知识上存在相当大的缺陷●Many environmental problems which could be eliminated or reduced by the application of current technology，butwhich are not dealt with because of society’s lack of will to do so，or in many instance because of a lack of resources to do so.许多环境问题可以应用现有技术消除或减少，但没有得到处理是因为社会缺乏这样做的意愿，或者像许多例子那样因为缺乏资源。
二氧化碳Carbon dioxide温室气体Greenhouse gases氧气Oxygen臭氧层 Ozone layer大气过程Atmospheric processes空气一水相互作用Air-water interaction大气环流Atmospheric circulation 大气降水Atmospheric precipitation 碳循环Carbon cycle蒸发作用Evaporation降水增加Precipitation enhancement 降雨Rainfall太阳辐射Solar radiation蒸腾作用Transpiration风Winds空气污染Air pollution 酸雨Acid rain空气污染物Air pollutants氯氟碳Chlorofluorocarbons沉降的颗粒物Deposited particulatematter飞灰Fly ash雾Fog薄烟Haze空内空气污染Indoor air pollution 烟雾Smog气候问题Climatic issues气候Climate气候变化Climatic change气候带Climatic zones干旱Drought全球变暖Global warming温室效应Greenhouse effect湿度Humidity海平面上升Sea level rise岩石圈 lithosphere火山Volcanoes风蚀Wind erosion陆地生态系统terrestrialECOSYSTEMS土壤Soils农用土地Agricultural land碱地Alkali lands污染的土地Contaminated land沙坑Gravel pits荒地Heath lands土地承载能力Land carrying capacity土地污染Land pollution土地开垦Land reclamation半干旱地区生态系统Semi-arid land ecosystems森林生态系统Forest ecosystems 植树造林Afforestation 针叶林Coniferous forests 森林砍伐Deforestation 森林保护Forest conservation 森林火灾Forest fires草地火灾Grass fires绿化带Greenbelts再造林Reafforestation 植被恢复Revegetation 亚热带生态系统Sub-tropica l ecosystems温带森林Temperate forests温带林地Temperate woodlands 树木Trees热带生态系统Tropical ecosystems 热带森林Tropical forests 热带森林生态系统Tropical forest ecosystems 林地生态系统Woodland ecosystems 温带生态系统和寒带生态系统Temperate ecosystems and cold zone ecosystems南极生态系统Antarctic ecosystems 南极地区Antarctic region 北极生态系统Arctic ecosystems 北极地区Arctic region ['ar kuk 寒带生态系统Cold zone ecosystems 草地生态系统Grassland ecosystems 永久冻土生态系统Permafrost土地恢复Land restoration 旱作Dry farming土地使用分类Land use classification 沙丘固定Sand dune fixation 沙石开采Sand extraction 沉积Sedimentation 土壤潜力Soil capabilities 土壤保持Soil conservation 土壤污染Soil contamination 土壤退化Soil degradation 土壤侵蚀Soil erosion 土壤改良Soilimprovement 土壤盐碱化Soilsalination 水蚀Water erosion干旱地区生态系统Arid landecosystems干旱土地Arid lands 沙漠化Desertification 抗旱Droughtcontrolecosystems极地生态系统Polar ecosystems 温带生态系统Temperate ecosystems 山地生态系统Mountain ecosystems 高原生态系统Highland ecosystems 湿地生态系统Wetlands ecosystems 红树沼泽Mangrove swamps 水禽Water fowl水涝地Waterlogged lands 流域管理Watershed management 水边开发Waterside development 生物多样性和保护区Biological diversity and protected areas 适应性强的物种Adaptable species 藻类Algae ,况M列生物多样性Biological diversity 生物栖地Biotopes基因资源保护Conservation of genetic resources濒危动物物种Endangered animal species濒危植物物种Endangered plantspecies动物区系F auna植物区系Flora细菌Bacteria酶Enzymes 'enzaimz真菌Fungi原生生物Protozoa病毒Viruses酵母Yeasts诱变剂Mutagens水的盐化Water salination饮用水处理Drinking watertreatment城市配水系统Municipal waterdistribution systems污水处理厂Sewage treatment plants水泵Water pumps可交易的许可证Tradeable permits 隔热Thermal insulation基础设施Infrastructure工业生产过程Industrial processes制铝工业Aluminium industry 适用技术Appropriate technology 高炉Blastfurnaces化学工业Chemical industry 清洁技术Clean technologies 金属加工Metalfinishing 金属电镀Metal plating 金属冶炼Metal smelting矿产业Mineral industry 采矿Mining天然气开采Natural gas extraction 原油开采Oil extraction 石油提炼Petroleum refining 印刷工业Printing industry 纸浆工业Pulp industry 采石Quarrying 橡胶加工Rubber processing 炼钢工业Steel industry 露天采矿Strip mining 焦油生产Tar production 焦油使用Tar沥青use 工业产品Industrial products 危险品Dangerous goods工业材料Industrial materials 包装Packaging涂料Paints可再用容器Reusable containers合成洗涤剂Synthetic detergents 合成纺织纤维Synthet ic textile['tekstailfbres漆Varnishes飞机噪音Aircraft noise沼气Biogas生物量Biomass生物质能Biomass energy煤Coal原油Crude oil矿物燃料Fossil fuels燃料酒精Fuel alcohol地热能Geothermal energy 碳氢化合物Hydrocarbon compounds水电Hydroelectric power液化气Liquefied gas甲烷Methane天然气Natural gas可再生能源Renewable energy sources不可再生能源Non-renewable energyresources无污染能源Non-polluting energysources核能Nuclear energy油类Oils泥炭、泥煤Peat汽油Petrols从废料中提取的燃料Refuse derivedfuels太阳能Solar energy 海洋热能Thermalsea power潮汐能Tidal energy轴Uranium波浪能Wave energy风能Wind energy 电力Electric power 发电厂Electric power plants 无机物质Inorganic substances 酸Acids氧化铝Alumina氯Chlorine盐酸Hydrochloric acid 硫化氢Hydrogen sulphide 硫酸盐Sulphates 硫酸Sulphuric acid光化学试剂Photochemical agents 光化学效应Photochemical effects 有机物质Organic substances有机硅化合物Organosilicon compounds 酚Phenols植物油Vegetable oils生物化学过程Biochemicalprocesses酸化Acidification需氧过程Aerobic processes厌氧过程Anaerobic processes 生物降解Biodegradation脱氮作用Denitrification 富营氧化Eutrophication 电离辐射Ionizing radiation代谢（作用），新陈代谢（作用）Metabolism固氮Nitrogen fixation 光合作用Photosynthesis物理一化学过程Physico-chemicalprocesses毒性Toxicity气溶胶，气雾剂Aerosols 农业废物Agricultural wastes 石棉Asbestos商业噪音Commercial noise 混合污染Composite pollution 二恶英Dioxins带哦个森死危险物质Hazardous substances 危险废物Hazardous wastes 重金属Heavymetals 医院废物Hospital wastes工业废水Industrial effluents 工业排放物Industrial emissions 工业烟尘Industrial fumes 工业噪声Industrial noise无机污染物Inorganic pollutants 铅污染Lead contamination丢弃物，废气物Litter汞污染Mercury contamination 微污染物Micropollutants采矿废物Mining wastes机动车辆排放物Motor vehicle emissions城市废物Municipal waste 氮氧化物Nitrogen oxides 噪声污染Noise pollution 恶臭公害Odour nuisance 有机物污染Organic pollutants 难降解有机污染物Persistent organic pollutants有机溶剂Organic solvents 有机卤化物Organohalogencompounds 医药废物Pharmaceutical wastes塑料废物Plastic wastes多氯联苯Polychlorinated biphenyls聚合物废物Polymer wastes放射性物质Radioactive substances氡Radon橡胶废物Rubber waste热污染Thermal pollution有毒物质Toxic substances 对流层臭氧Tropospheric ozone 水泥工业Cement industry 海洋倾倒Oceandumping石油泄漏Oil spills废金属Scrap metals燃料脱硫Desulphurization of fuels过滤器Filters污染治理设备Pollution abatementequipment污染控制技术Pollution controltechnology洗涤器Scrubbers分离器Separators 电池处理Batterydisposal 废物的化学处理Chemicaltreatment of waste回收Recycling材料再利用Reuse of materials卫生填埋Sanitary landfills 污水处置Sewage disposal 污水处理系统Sewagetreatment systems 固体废物处置Solidwaste disposal 废物同化处置Wasteassimilationcapacities废物转化技术Waste conversiontechniques废物土地处置Waste disposal in the ground废物回收Waste recovery 废物利用Waste use水的再利用Water reuse镉污染Cadmium contamination 污染物分析Pollutant analysis 污染物分布Pollutant distribution 污染物浓度Pollutant levels 污染物监测Pollutant monitoring 污染物路径Pollutant pathways 污染物来源鉴别Pollutant source identification本底监测Baseline monitoring环境标准Environmental criteria环境评价Environmentalassessment环境统计Environmental statistics 色谱分析Chromatographicanalysis气象色谱法Gas chromatography 放射性示踪技术Radioactive tracertechniques采样技术Sampling techniques模拟Simulation污染者付费原则Polluter-paysprinciple危险废物的出口Export of hazardouswastes贸易避垒Trade barriers越境污染Trans-frontier pollution遥感Remote sensing多谱线扫描器Multispectral scanner地理信息系统Geographicinformation systems纬度Latitude经度Longitude。
环境工程专业英语翻译(1)Unit one Environmental Engineering环境工程What is this book about？这本书是关于什么的？The objective of this book is to introduce engineering and science students to the interdisciplinary study of environment problems；their cause，why they are of concern，and how we can control them. The book includes:这本书的目的是使理工科的学生了解跨学科间的研究环境问题;它们的起因，为什么它们受到关注，以及我们怎样控制它们。
这本书包括：●Description of what is meant by environment and environmental systems描述环境和环境系统意味着什么●Information on the basic causes of environmental disturbances关于引起环境干扰基础原因的基本信息●Basic scientific knowledge necessary to understand the nature of environmental problems and to be able to quantify them 理解环境问题本质，并能够定量计算它们所必要的基本科学知识●Current state of the technology of environmental control in its application to water，air and pollution problems目前适用于水，空气和环境污染问题的环境控制技术的现状●Considerable gaps in our current scientific knowledge of understanding and controlling many of the complex interactions between human activities and nature我们目前的科学知识在理解和控制人类活动和自然之间复杂的相互作用的科学知识上存在相当大的缺陷●Many environmental problems which could be eliminated or reduced by the application of current technology，but which are not dealt with because of society’s lack of will to do so，or in many instance because of a lack of resources to do so.许多环境问题可以应用现有技术消除或减少，但没有得到处理是因为社会缺乏这样做的意愿，或者像许多例子那样因为缺乏资源。
Unit one Environmental Engineering环境工程What is this book about？这本书是关于什么的？The objective of this book is to introduce engineering and science students to the interdisciplinary study of environment problems；their cause，why they are of concern，and how we can control them. The book includes:这本书的目的是使理工科的学生了解跨学科间的研究环境问题;它们的起因，为什么它们受到关注，以及我们怎样控制它们。
这本书包括：●Description of what is meant by environment and environmental systems描述环境和环境系统意味着什么●Information on the basic causes of environmental disturbances关于引起环境干扰基础原因的基本信息●Basic scientific knowledge necessary to understand the nature of environmental problems and to be able toquantify them理解环境问题本质，并能够定量计算它们所必要的基本科学知识●Current state of the technology of environmental control in its application to water，air and pollution problems目前适用于水，空气和环境污染问题的环境控制技术的现状●Considerable gaps in our current scientific knowledge of understanding and controlling many of the complexinteractions between human activities and nature我们目前的科学知识在理解和控制人类活动和自然之间复杂的相互作用的科学知识上存在相当大的缺陷●Many environmental problems which could be eliminated or reduced by the application of current technology，butwhich are not dealt with because of society’s lack of will to do so，or in many instance because of a lack of resources to do so.许多环境问题可以应用现有技术消除或减少，但没有得到处理是因为社会缺乏这样做的意愿，或者像许多例子那样因为缺乏资源。
1. The Environment and Environmental Engineering环境和环境工程学Simply said, the environment can be defined as one's surroundings. In terms of theenvironmental engineer'sinvolvement, however, a more specific definition is needed. To the environmentalengineer,the word environment may take on global dimensions, m ay refer to avery localized area in which a specific problem must be addressed,or may, in the case of containedenvironments,refer to a small volume of liquid, gaseous,or solid materials within atreatment plant reactor.简单的说，环境可以定义为我们的周围。
但是就环境工程师参与的角度来说，需要一个更加明确的定义。
对于环境工程师来说，环境这个词可能包含全球范围；也可能专指非常局部的一个地区，在这个地区中涉及到一些具体要解决的问题；或者也可能在密闭的环境中，指处理厂反应器内的一小块液体、气体或固体。
The global environment consists of the atmosphere, thehydrosphereand the lithosphere inwhich the life-sustaining resources of the earth are contained. The atmosphere, a mixture of gasesextending outward from the surface o f the earth, evolved from elementsof the earth that weregasified during its formation and metamorphosis. The hydrosphere consists of the oceans,the lakesand streams and the shallow groundwater bodies that interflow with the surface water.Thelithosphere is the soil mantle that wraps the core of the earth.全球环境由大气圈、水圈和岩石圈所组成，其中包含了维系地球上生命的资源。
Unit one Environmental Engineering环境工程What is this book about？这本书是关于什么的？The objective of this book is to introduce engineering and science students to the interdisciplinary study of environment problems；their cause，why they are of concern，and how we can control them. The book includes:这本书的目的是使理工科的学生了解跨学科间的研究环境问题;它们的起因，为什么它们受到关注，以及我们怎样控制它们。
这本书包括：●Description of what is meant by environment and environmental systems描述环境和环境系统意味着什么●Information on the basic causes of environmental disturbances关于引起环境干扰基础原因的基本信息●Basic scientific knowledge necessary to understand the nature of environmental problems and to be able toquantify them理解环境问题本质，并能够定量计算它们所必要的基本科学知识●Current state of the technology of environmental control in its application to water，air and pollution problems目前适用于水，空气和环境污染问题的环境控制技术的现状●Considerable gaps in our current scientific knowledge of understanding and controlling many of the complexinteractions between human activities and nature我们目前的科学知识在理解和控制人类活动和自然之间复杂的相互作用的科学知识上存在相当大的缺陷●Many environmental problems which could be eliminated or reduced by the application of current technology，butwhich are not dealt with because of society’s lack of will to do so，or in many instance because of a lack of resources to do so.许多环境问题可以应用现有技术消除或减少，但没有得到处理是因为社会缺乏这样做的意愿，或者像许多例子那样因为缺乏资源。
Unit 1情况工程本书的内容：本书的目的是使工科和理科学生对情况问题的跨学科的研究有所了解：情况问题的起因，情况问题受存眷的原因，如何控制情况问题。
本书包罗如下内容：﹡对情况和情况系统而言情况问题寄义的描述﹡关于造成情况破坏的根本原因的信息﹡要了解情况问题性质并且量化情况问题所必须的根本科学知识﹡情况控制技能在在水、大气和固废污染问题方面运用的现状﹡我们目前对人类运动与自然之间的许多庞大的相互干系的理解和控制的科学知识的严重不敷﹡采取现有技能可以用来消除或减轻有许多情况问题，当实际上并没有，这是因为社会缺乏意愿去处理惩罚情况问题，或因为在许多情况下缺少处理惩罚情况问题所需的资源一些重要的界说当新词在这本书中第一次出现时，它的界说以正楷大写字母开头的形式给出（正如这里给出的）或以粗体字体给出。
﹡情况：是指我们周围的物理和生物生境，我们可以看到，听到，触到，闻到和感触这些事物。
﹡系统：凭据韦氏字典，系统为相关和相联的一组或一系列事情形成一个单位或有机体，例如：太阳系，灌溉系统，供给系统和世界或宇宙。
﹡污染：可以界说为空气、水或土壤的物理化学或生物特性产生恶化以至于对人类或生物有机体的康健、生存或活性造成了危害。
当改进情况质量的目的是用来改进人体康健时，情况这个词的寄义就拓宽到包罗种种社会、经济和文化方面，但这样的拓宽对许多实际情况不可行的，对为一学期时间设计的课程而言是不现实的。
从而我们对情况问题视察时把情况的界说做了限制。
各系统间的相互作用与水、大气或土地系统来说有一些差别的相关情况问题。
而许多问题只是适用于其中的一个系统，正因为此这也说明了上述分类的公道性。
如此的分类另有利于更容易对一个系统内相关问题的理解。
并且从行政治理方面看也是公道的，因为政府机构经常把情况问题分为空气污染、供水、污水处理惩罚和固体废物处理几个方面来处理惩罚。
但有许多重要的情况问题并不局限于大气、水或土地系统中的某个单一系统，而是包罗各系统之间的相互作用。
1. The Environment and Environmental Engineering环境和环境工程学Simply said, the environment can be defined as one's surroundings. In terms of the environmental engineer's i nvolvement, however, a more specific definition is needed. To the environmental engineer, t he word environment may take on global dimensions, may refer to a very localized area in which a specific problem must be addressed, o r may, in the case of contained e nvironments, refer to a small volume of liquid, gaseous, or solid materials within a treatment plant reactor.简单的说，环境可以定义为我们的周围。
但是就环境工程师参与的角度来说，需要一个更加明确的定义。
对于环境工程师来说，环境这个词可能包含全球范围；也可能专指非常局部的一个地区，在这个地区中涉及到一些具体要解决的问题；或者也可能在密闭的环境中，指处理厂反应器内的一小块液体、气体或固体。
The global environment consists of the atmosphere, the h ydrosphere a nd the lithosphere in which the life-sustaining resources of the earth are contained. The atmosphere, a mixture of gases extending outward from the surface of the earth, evolved from elements o f the earth that were gasified during its formation and metamorphosis. The hydrosphere consists of the oceans,the lakes and streams and the shallow groundwater bodies that interflow with the surface water.The lithosphere is the soil mantle that wraps the core of the earth.全球环境由大气圈、水圈和岩石圈所组成，其中包含了维系地球上生命的资源。
大气圈，从地球表面向外延伸的一种混合气体，它从地球的形成和变化过程中气化产生的元素演变而来。
水圈由海洋、湖泊、溪流以及与地表水互通的浅层地下水体所组成。
岩石圈是指包围地核的土质地幔。
The biosphere, a thin shell that encapsulates the earth, is made up of the atmosphere a nd lithosphere adjacent t o the surface of the earth, together with the hydrosphere. I t is within the biosphere that the life forms of earth, including humans, live.Life-sustaining materials in gaseous, liquid, and solid forms are cycled through the biosphere, providing sustenance t o all living organisms.生物圈是包裹住地球的薄薄的外壳，是由大气圈和地表附近的岩石圈，以及水圈组成的。
地球上的生命形式，包括人类、动物存在于生物圈内。
气态、液态和固态形式的生命维持物在生物圈内循环，向所有生命体提供营养物质。
Life-sustaining resources¡ª¡ªair, food, and water¡ª¡ªare withdrawn from the biosphere. It is also into the biosphere t hat waste products in gaseous, liquid, and solid forms are discharges. From the beginning of time, the biosphere h as received and assimilated the wastes generated by plant and animal life. Natural systems have been ever active, dispersing smoke from forest fires, diluting animal wastes washed into streams and rivers, and converting debris, of past generations of plant and animal life into soil rich enough to support future populations.维持生命的资源¡ª¡ª空气、食物和水¡ª¡ª是从生物圈内提取的。
废物也是以气态、液态和固态形式排放到生物圈中的。
从刚开始的时候起，生物圈就接受和消化植物和动物产生的废弃物。
自然生态系统已经空前活跃，将森林大火产生的烟扩散，稀释冲入小溪和河流中的动物排泄物以及把过去几代植物和动物的残骸转化成足以供养后续生物的肥沃土壤。
biological characteristics o f the environment, for every incident that eroded the quality of the immediate, or local environment, there were natural actions that restored that quality. Only in recent years has it becomes apparent that the sustaining and assimilative capacity of the biosphere, though tremendous, is not, after all, infinite.Though the system has operated for millions of years,it has begun to show signs of stress, primarily because o f the impact of humans upon the environment.对于每种自然行为的污染，对于环境在每种物理、化学、生物特性上不可取的变化，对于每种侵蚀当下或当地环境质量的事件，有自然行为会恢复那种质量。
只是到了近几年，生物圈的维持和消化能力尽管巨大，但毕竟不是无限的这一事实才变得明显。
尽管系统运行了几百万年，但它开始发出有压力的信号，主要是由于人类对环境的影响。
Environmental engineering has been defined as the branch of engineering that is c oncernedwith protecting the environment from the potential, deleterious effects of human activity, protecting human population from the effects of adverse e nvironmental factors, and improving environmental quality for human health and well-being.环境工程被定义为工程学的一个分支，其主要关注保护环境不受人类活动的潜在有害影响，保护人类不受不利环境因素的影响以及为人类的健康和幸福而改善环境质量。
As the above definition implies, humans interact with their environment¡ª¡ªsometimes adversely impacting the environment and sometimes being adversely impacted by pollutants in the environment. An understanding of the nature of the environment and of human interaction with itis a necessary prerequisite to understanding the work of the environmental engineer.上述定义表明，人类与环境相互影响¡ª¡ª有时对环境造成不利影响，有时受到环境污染物的不利影响。
了解环境的本质以及人类与环境的相互作用，是了解环境工程师工作的一个必要的先决条件。
2. Ecology生态学The recognition that all life forms are inextricably dependent o n one another and on the physical environment is a fairly recent phenomenon. The word ¡°ecology¡± was not even invented until the mid-1800s, and the study of ecology as a branch of natural sciences was not widespread until a few decades ago.所有生命形式不可避免的相互依赖且依赖自然环境是一个最近认识到的现象。
