化工构词特点.ppt

《化工构词特点.ppt》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。

1、科技英语的特点(ScientificEnglish)VS(General English)"Itappearsthatyou'vegottheofferofaverygoodjob.""Awonderfuljob.""Areyougoingtotakeit?""Idon'tthinkso.""Whynot?”"Idon'twantto."这是小说中的一段对说，属于口语文体。其特点是：用词自由，句法结构简单，短句与省略句多，自然朴素，生活气息浓厚。"听说有个很好的工作要你去干。""挺好的工作"。"打算干吗？""不。""为什么不干？""不想干"。摘自《刀锋》（t

2、heRazor'sEdge）《Gonewithwind》：Home!I‘llgohome,andI‘llthinkofsomewaytogethimback.Afterall,tomorrowisanotherday.《Titanic》：Jack:Listen,Rose.You'regoingtogetoutofhere.You'regoingtogoon.You'regoingtomakelotsofbabies,andyou'regoingtowatchthemgrow.You'regoingtodieandold,anoldladyinherwarmbed,nother

3、e,notthisnight,notlikethis.Doyouunderstandme?《ForrestGump》：Lifeislikeaboxofchocolate,youneverknowwhatyou’regonnaget.onceIletatrueloveslipawaybeforemyeyes,onlytofindmyselfregrettingwhenitwastoolate,nothingintheworldcanbeaspainfulasthis.IftheGodwoundgiveachance,IwoundtellthegirlIlovethegirl;i

4、fourlovehavetobesettledatimelimit,Iwishitwoundbetenhoundsofyears!InChinahe‘sknownas’theFlyingFish‘;inAmericatheycallhim’theBaltimore（巴尔的摩）Bullet'.Whateveryoucallhim,AmericanswimmerMichaelPhelpslooksdestinedtobecomeahouseholdnameacrosstheworldafterbreakingtheOlympicrecordformostgoldmedalsina

5、singleGames.MichaelPhelpsdominatedthefieldinsevenofhisracesandsetanamazingsevenworldrecordsintheprocess.MichaelPhelpsThewidespreaduseofhalogenoalkanesleadstopollutionproblems:Aromatichalogencompoundsandalkanesinwhichthreeorfourhalogenatomsarejoinedtothesamecarbonatomarenothydrolysed—theyare

6、notbiodegradable—butaresolubleinbodyfats.Thismeansthattheygetconcentratedinorganisms,whicharetheneatenbypredators.Thisresultsinaneverincreasingconcentrationofthesecompoundsinthebodytissuesofanimalsfurtherupthefoodchain.PollutionproblemsTheycanserveasvaluableleadstructures,andtheyarefrequent

7、lyneededasstartingmaterialsorasintermediatesforimportantsyntheticproducts.Severaltherapeuticallysignificantnaturalproductswhichwereoriginallyobtainedfromnaturalsourcesaretodaymoreeffectively–i.e.moreeconomically–preparedbytotalsynthesis.Suchexamplesinclu