化工专业英语构词法.ppt

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1、专业英语和大学英语,1.词汇的专业性 plant：工厂、车间 charge：电荷 positive charge：正电荷 base：碱,1,2023/11/2,植物,负责、收费,基础,专业英语和大学英语,2.词汇构词法词尾：一般化学元素多以“-ium”结尾，如：Sodium 代表Na(钠)、Chromium 代表Cr(铬)等。前缀：mono-：一；di-：二，如：carbon monoxide(CO)；carbon dioxide(CO2)后缀：-ane：烷烃，-ene：烯烃，-one：酮，如：propane（丙烷）propylene（丙烯）acetone（丙酮）,2,2023/11/2,专业

2、英语和大学英语,3.缩写词汇COD：Chemical Oxygen Demand化学需氧量BOD：Biochemical Oxygen Demand生物需氧量b.p.：Boiling point 沸点,3,2023/11/2,专业英语和大学英语,4.长句多且结构复杂 Flash distillation consists of vaporizing a definite fraction of liquid in such a way that the evolved vapor is in equilibrium with the residual liquid,separating the

3、 vapor from the liquid，and condensing the vapor,4,2023/11/2,专业英语的由来,专业英语的概念是早在1964年由Halliday与Mcinfash和Stmvens在其合著的The Linguistic Sciences and Language Teaching一书中首先提出来的：English for Specific Purpose or English for Special Purpose后来，Tom Hutchinson and Alan Waters在其著作“English for Specific Purposes：a le

4、arningcentered approach(1987)”中对专业英语做了更加厂泛的定义：ESP is an approach to language teaching in which all decisions as to content and method are based on the learners reason for learning,5,2023/11/2,2007级材料专业某同学毕业论文摘要,本论文主要研究了含Co纳米复合金属氧化物的制备及其对高氯酸铵(AP)热分解的催化性能。以Co/Ni/Fe类水滑石为前驱体，经高温焙烧制得Co/Ni/Fe纳米复合金属氧化物，采用X

5、射线粉末衍射(XRD)、热重分析(TGA)和透射电镜(TEM)对其结构、热稳定性及形貌进行了表征，并通过差示量热扫描分析(DSC)和TGA研究了含Co纳米复合金属氧化物对AP热分解的催化性能。,6,2023/11/2,The cobalt-containing nanoscale mixed metal oxides were prepared and their catalytic behavior on thermal decomposition of Ammonium Perchlorate(AP)was investigated.Co/Ni/Fe nanoscale mixed met

6、al oxides were obtained by calcination of Co/Ni/Fe hydrotalcites precursors.X-ray powder diffraction(XRD),thermo gravimetric analysis(TGA)and transmission electron microscopy(TEM)were used to characterize their structure and morphology,and their catalytic behaviors on thermal decomposition of AP wer

7、e investigated by differential scanning analysis(DSC)and TGA.,7,2023/11/2,加强专业英语、基础英语和专业课程的联系例如：Surfactants are usually organic compounds that are amphiphilic，meaning they contain both hydrophobic groups(their“tails”)and hydrophilic groups(their“heads”)首先应该了解专业知识，表面活性剂是指具有固定的亲水亲油基团，在溶液的表面能定向排列，并能使表面

8、张力显著下降的物质。而且是由疏水基团，亲水基团二部分组成。分析：句中that are amphiphilic为定语从句，修饰compounds，meaning引导同位语从句，说明that are amphiphilic的含义。翻译：表面活性剂通常是两性的有机化合物，意思是它们既含有疏水基团，又含有亲水基团。,8,2023/11/2,Nobody can go back and start a new beginning,but anyone can start now and make a new ending.没有人可以回到过去重新开始，但谁都可以从现在开始，书写一个全然不同的结局。,9,2023/11/2,