【正文】 ion of oxygen also slows down，and the natural ability of the river to recover（process3）bees predominant。For the first 50km or so downstream, the natural ability of the river to recover its oxygen（process3）simple cannot keep up with the feasting bacteria（process2），so the dissolved oxygen concentration goes down。The measure of this potential is the BOD, which rises as soon as the sewage goes in。1）most boating associations now urge their members never even to take anything disposable and plastic to sea and encourage ocean liners to follow ，并鼓勵航海輪船也這樣做。2)ATamp。3）the two types of logic are qualitative and quantitative 。 secondary air pollution is a harmful chemical formed in the atmosphere through a chemical reaction among air 。 prevention: Pollution may be generated during manufacturing, or when certain products are used mercially or by ：污染可能在生產(chǎn)過程之中產(chǎn)生，或者在當(dāng)一個產(chǎn)品被用作商業(yè)用途或被消費者使用的時候產(chǎn)生。 can be defined as an undesirable change in the physical，chemical，or biological characteristics of the air，water，or land that can harmfully affect the health，survival，or activities of humans or other living ，生存，活動的人或其它生物體的空氣，水，或土地的物理，化學(xué)或生物特性的不應(yīng)該有的變化。the overall situation is still Metal Pollution is the main way of soil the heavy metal is from chemical can see a situation of land desertification and soil erosion is very addition, the quality of cultivated land in our country down very the same time, the excessive use of pesticides has caused serious pollutions of cultivated land, whichdirectly related to food safety issues of our is not denied that our economy has developed rapidly, and our GDP is second to from the fact of environment, we can find our economy is just base will have not a place to stay, and even we also we call for everyone to remember it, environment is the first, and the economy is second to you!第四篇：環(huán)境科學(xué)與工程專業(yè)英語一、單詞/詞組（考試時要求：中譯英/英譯中）環(huán)境科學(xué)：environmental science環(huán)境工程：environmental engineering定量環(huán)境科學(xué)：quantitative environmental science 定性環(huán)境科學(xué)：qualitative environmental science 衰減再生：decay and recycling新陳代謝率：metabolic rates外來物質(zhì)：foreign matter研究和發(fā)展：Research and Development一次大氣污染物：primary air pollutant 二次大氣污染物：secondary air pollutant氧含量：Oxygen content點源：point sources瀝青殘留物：asphaltic residue酸雨：acid rain設(shè)備維護：facilities maintenance廢物最小化：waste minimization正常濃度：normal concentration胡亂收集：magpie collection需氧量：oxygen demand/the amount of oxygen required 閉合回路：closedloop微生物：microbe/microorganisms揭示大的差別。s survey shows that more than every year caused by air , our water pollution question is extremely widespread around the drinking water security problems are threat to human survival a large amount of fund has been put into these years, the effect is not obvious。比如，太陽系統(tǒng)，灌溉系統(tǒng)，供水系統(tǒng)，世界或宇宙”。 :The use or reuse of a waste as a substitute for a mercial product or as a feedstock to an industrial ：作為一個商業(yè)產(chǎn)品的代替品，或作為一個工業(yè)過程的原料的利用或再利用。 primary air pollution is a chemical added directly to the air that occursin a harmful 。2)When the collection and organization of date reveal certain regularities, it may bepossible to formulate a generalization or hypothesis當(dāng)對數(shù)據(jù)收集和整理披露了某些規(guī)律時，可能歸納出概況或假設(shè)。1)APS materials,inc,generated two hazardous wastes,111 trichloroethane and methanol from cold solvent degreasing operations associated with their plasma spray deposition ，即1,1,1三氯乙烷和甲醇。2）by themselves，measured concentrations tell us nothing about the danger caused by pollutants，because threshold levels，synergy，and biological magnification are also determining factors測量的濃度自身并未告訴我們有關(guān)污染物造成的危害的信息，因為臨界濃度，協(xié)同作用和生長放大效應(yīng)都是決定因素。But the potential for oxygen depletion exists wherever there is sewage。 of the lost oxygen is being replenished from the atmosphere and form photosynthesis by the vegetation in the stream。The fish kills start about 15km downstream from the introduction of the raw sewage。Of course，if additional sewage is discharged before recovery is plete，as shown in the illustration at 160km，the river bees pollution again。因此，學(xué)生將來在工作崗位上能否讀懂這些資料就是擺在面前的一個嚴(yán)峻的問題，特別是在生產(chǎn)實際中碰到現(xiàn)場實際問題的時候，很可能需要查閱原版英文資料或與相關(guān)專家用英語交流專業(yè)技術(shù)來謀取解決途徑，所以機械工程專業(yè)英語的掌握就變得越來越重要。只有既懂外語又懂專業(yè)的人才能適應(yīng)全面的對外開放，專業(yè)英語一般內(nèi)容較為枯燥，闡述的是原理概念，結(jié)構(gòu)嚴(yán)謹，不注重文字修飾，重在客觀事實；專業(yè)詞匯多，邏輯性強，理論推導(dǎo)多，有獨特的文體形式和表達方式。也許自己在學(xué)習(xí)過程中就會對翻譯出來的東西拿捏不穩(wěn)，或者自己都不明白，更不能保證對錯了。提高專業(yè)英語資料的閱讀能力必須擴大詞匯量，掌握一定量的專業(yè)詞匯?！芭d趣是最好的老師”，興趣是學(xué)習(xí)英語的巨大動力，有了興趣，學(xué)習(xí)就會事半功倍。多讓自己去嘗試，通過努力讓自己體會成功的愉悅。