pollution n. 污染同/近义词：Contamination n. 污染pollutant(s) n. 污染物同/近义词：Effluent n. 排放物Emission n. 排放、排放物pollute v. 污染同/近义词：Contaminate v. primary air pollutant:一次污染物emit v. 排放同/近义词：Discharge v. 排放stagnation n. 停滞threshold n. 极限,域值threshold level n. 极限水平,临界值synergy ['sɪnədʒɪ] n. 协同,配合magnification n. 放大,放大倍率biological mangnification 生物累积作用oxide n. 氧化物mon-oxide n. 一氧化物di-oxide n. 二氧化物tri-oxide n. 三氧化物tetra- n. 词头：四penta- n. ：五pentagonhexa- n. ：六nitrogen n. 氮nitrous a. 氮的，含氮的hydrocarbons n. 烃，碳氢化合物benzene n. 苯Photochemical = Photo（光）+ chemical（化学）Photochemical smog 光化学烟雾oxidant(s) n. 氧化剂particulate(s) n. 颗粒，微粒dust n. 尘soot n. 烟灰，煤烟metallic a. 金属的lead n. 铅cadmium n镉spray n. 喷雾，飞沫v. 喷射，喷溅sulfate n. 硫酸盐pesticide(s) n. 杀虫剂同/近义词insecticide herbicide(s) n. 除草剂同/近义词weedicidepesticide = pest + icidepest 有害物-icide 杀suicide = su- + -icide 自杀su- = self- insecticide = insect + icide insect- 节昆虫herbicide = herb + icide herb 草本植物radon n. 氡fossil n. 化石（such as: coal )e’mission n. 散发，发射，排放aerobic a. 需氧的smelt v. 冶炼ore(s) [ɔ:z] n. 矿石erosion n. 腐蚀，侵蚀mining n. 采矿，矿业1) A primary air pollutant is a chemical added directly to the air that occurs in aharmful concentration.一次污染物是人们直接排放在空气中达到了有害浓度的化学物质。
2). A secondary air pollutant is a harmful chemical formed in the atmosphere through a chemical reaction among air components.3). Serious air pollution usually results over a city or other area that is emitting high levels of pollutants during a period of air stagnation.4)The geographic location of some heavily populated cities, such as Los Angeles andMexico City, makes them particularly susceptible to frequent air stagnation and pollution buildup.5)we run into the issue of conflicting views of what constitutes harm.我们的什么构成危害的观点也陷入矛盾之中。
cyclones：n. 旋风分离器e,lectro’static precipitatio n静电除尘器fabric filters 织物过滤器(wet) scrubbers:(湿式)除尘器/洗涤器device(s) n. 装置同/近义词equipment; installationgranular a. 粒状的conduct v. 传导, 采取exam: 1. conduct an investigation (into)2.In an earlier study, we conducted a series of treatment tests on wastewater collectedfrom the PC board shop.3.Treatment tests of wastewater samples were conducted in 500 or 1,000 ml glassbeakers.4.research is being conducted on devices or combinations of conventional devices charged droplet scrubber 带电荷液滴洗涤器conically adv. 成圆锥形地tangentially adv. 沿切线方向的spiral a. 螺旋的centrifugal a. 离心的plug v. 堵塞dehydrator n. 脱水器de- 否定词头; hydra-水合的; 水力的detergent n. 洗涤剂baghouse n. 布袋upstream side n. 迎着气流的一面retain v. 保持,保留同/近义词stag’nate v. 使停滞,滞留keep v. holdperiodically adv. 周期性地,定时性地shake off 抖落,摆脱hopper n. 斗the dew point 露点‘inlet n. 进口反义词outlet n. 出口be laden with 充满；携带，含有particle-laden (gas) 携带颗粒物的气流employ v. 采用Exam. 1). a factory employing a new process of water treatmentor: a new process of water treatment was applied in the factory;i.e. the application of the new process of water treatment / the application of the new water treatment process3). 生化单元采用活性污泥法biochemical unit; activated sludge process efficiency n. 效率low efficiency process v 处理，加工process ore to obtain minerals; process cheeses n. 工艺流程；生产过程the activated sludge process; the process includes 4 stepsvary v. 改变；变更various a. 不同的；各种各样的variation n. 变化；变异pressure drop 压力损失spray tower n. 喷雾塔packed tower n. 填料塔impingement n. 冲击，侵犯impingement plate tower 冲击式板式塔incinerator n. 焚烧装置（such as, furnace)lime n. 石灰impart v. 给予（尤指抽象事物）传授、告知converging a. 收敛、收缩diverge a. 分叉、分歧converging-diverging duct section 收缩扩大管截面draft fan 引风机conjunction n. 联合，关联，连接in conjunction with 与……协力settling ponds 沉淀池liquid film 液膜e,lectro’static =electro- “前缀：电的，用电的” + static “静态的”electrostatic field 静电场ionize v. 使离子化；电离ion n. 离子ion exchange resin 离子交换树脂discharge v. 排放n. 电流（在非导体中的电流，尤指稀薄气体中的电流）migrate v. 移动，移往move (to)polarity n. 相反的neutralize v. 使中和；使中立suspended a. 悬浮的flush v. 冲洗1）… granular bed and panel bed filters have been applied to a limited extent and research is being conducted on devices or combinations of conventional devices科技文章侧重叙事推理，强调客观准确。
使用被动句的情况：不必说出主语、不愿说出主语或说不出主语。
科技文体往往是前后两种。
科技文体所述的是客观规律，尽量避免使用第一、第二人称。
2)The centrifugal force is the major force causing separation of the particulate in acyclone separator.分析: causing … 修饰the force 是非限定性结构3)The spiral motion produces the centrifugal forces that cause the particulate matter tomove toward the periphery of the vessel and collect on the walls and fall to the bottom of the vessel.(这种)螺旋运动产生离心力，离心力使得颗粒物质向除尘器的外周运动并且在外壁被截留然后落入除尘器的底部。
4) The basic filter collector or baghouse is capable of operating in excess of 99% efficiency, although satisfactory operation of the system is contingent upon the characteristics of the gas stream (1) and the particulate matter (2)being removed.5）The high energy scrubber, or Venturi, imparts high velocity to the gas stream by means of converging-diverging duct section, and contacts the stream with injected water.分析：红色为主语；谓语动词两个—— impart；contact6）Gas cleaning by electrostatic precipitation is particularly suited for gas streams which can be easily ionized and which contain either liquid or solid particulate matter.分析：gas cleaning by …后置定语7) The method of removal consists of passing the particle-laden gas through an electrostatic field produced by a high voltage electrode(1) and grounded collection surface(2). biodegradation n. 生物降解biodegrade v. 生物降解contaminate v. 污染同/近义词pollute synthetic a 合成的，人造的bioremediation n. 生物修复bio- “前缀：生物的” + remediation“补救，纠正”remedy 治疗，补救，修补biofiltration n. 生物过滤practical a. 实践的practice n./v. 实践practice oral En.professional n. 专业人员a. 专业的off - gas n. 废气，尾气，出口气odors n. 气味；臭气odorous a. 有气味的toxic a. 有毒的，中毒的n. 有毒物同/近义词poisonous a. 有毒的poison n. 毒物、毒药noxious a. 有毒的、有害的deleterious a. 有害的、有毒的harmful a. 有害的hazard n. 危险、公害hazardous a. 危险的、冒险的volatile a. 挥发的volatile organic compounds (VOC) 挥发性有机化合物sector n. 部门bring about 使发生，致使increasingly ad. 日益增长的，愈加stringent a. 严厉的，迫切的address n. 地址address v. 致辞，演讲，从事，处理deal with; tackle obstacles n. 障碍widespread a. 分布广泛的，普遍的wide full-scale a. 与原物一般大小的；工业规模的( 类比pilot )ethanol n. 酒精，乙醇perform v. 执行，表演performance n. 执行，表现，性能disseminate v. 散布to spread abroadexam. disseminate information 散布消息innovative a. 创新的innovate v. 改革，创新implementation n. 执行，应用implement v. bioscrubber n. 生物洗涤器trickle v. 滴流trickling filter n. 滴滤器literature n. 文学作品；著作；文献soil bed n.土壤床sewage n. 污水；下水道同/近义词wastewater n. 废水、污水sewer n. 下水道sewer main 主要下水道municipal a. 市政的incoming a. 引入的，近来的sorption n. 吸附作用(adsorption 吸附)owe to v. 归功于capital n. 资本，资金predominate v. 占优势，掌握，控制= pre（前、预）+dominate（控制）predominantly ad. 主要地aerosol n. 气溶胶，气雾剂aerosol can n. 气雾剂罐Specifically, regulatory programs in most U.S. states have not yet addressed, in a comprehensive manner, the control of air toxics, VOC and odors from smaller sources.特别地，在美国大多数州控制小型排放源排放的大气有毒物质、VOC及臭气的法律法规还没有被系统地提上议事日程。