科技英語

內(nèi)容概要

本書是按照教育部《大學(xué)英語專業(yè)閱讀階段教學(xué)基本要求》編寫而成。是高年級(jí)學(xué)生在專業(yè)知識(shí)和英語學(xué)習(xí)上的補(bǔ)充和提高，也是學(xué)生開闊視野，直接了解世界范圍內(nèi)專業(yè)前沿知識(shí)和技術(shù)發(fā)展的必要途徑。    本書選材廣泛，—內(nèi)容新穎，既側(cè)重于專業(yè)性基礎(chǔ)英語的學(xué)習(xí)，又注意增加一些現(xiàn)代科技前沿的知識(shí)，內(nèi)容涵蓋了化學(xué)、環(huán)境和生物接術(shù)等方面。課文難易適當(dāng)，語言生動(dòng)，結(jié)構(gòu)嚴(yán)謹(jǐn)。課文后面配有專業(yè)性詞匯、詞組的解釋和課文關(guān)鍵性句子的注解，便于學(xué)生自學(xué)。本書適合于理工科本、?？茙熒⒄Z教學(xué)使用。

書籍目錄

Unit 1  Air Fit to Breathe　[ Reading material]   Recycling the WorldUnit 2  Chemical Equations and Formulas　[ Reading material ]  History of ChemistryUnit 3  Detergent　[ Reading material ]   Numbers in Physical QuantitiesUnit 4  Conductivity without Metals　[ Reading material]   Units of MeasurementUnit 5  Applications of Electrolysis　[ Reading material ]   Nomenclature of Inorganic CompoundsUnit 6  All Shapes and Sizes　[ Reading material]   Nomenclature for Organic Compounds and Groups ..Unit 7  The Global Warmers　[ Reading material ]   Origin of the Gene BanksUnit 8  Traffic Technology Drives to Clear the Road　[ Reading material ]   Facts in the Development'of TransportationUnit 9  GM Organisms－Is GM the Future?　[ Reading material ]   Genetic ModificationUnit 10  Climate Change　[ Reading material]   HurricanesUnit 11  Pesticides and Pest Control　[ Reading material ]   Clean ProductionUnit 12  Energy　[ Reading material ]   The Future of Clean CoalUnit 13  Carbon Capture Strategy Could Lead To Emission-free Cars　[ Reading material ]   Food Containers Leach a Potentially Harmful ChemicalUnit 14  Spy Satellite　[ Reading material ]   A Review of the U.S. Missile Defence SystemUnit 15  America's Wetlands (1)　[ Reading material]   America's Wetlands (2)Unit 16  Creating Molecules and Materials by Design (1)　[Reading material]   Creating Molecules and Materials by Design (2)Appendix 1  科技英語詞匯構(gòu)成及解釋Appendix 2　科技英語常用前綴和后綴

章節(jié)摘錄

　　Unit 3　　Detergent　　Detergent is a material that increases the cleaning effect of water on soiled objects.There are also non-aqueous detergents that enhance the cleaning power of organicsolvents；for example，they are used in dry cleaning and in engine oils to prevent dirtand gummy decomposition products from depositing on the metal.However，thislesson will discuss only those detergents that are effective in water.　　Composition：Detergents vary in composition，depending on the cleaning task forwhich they are tended.Those that are used for laundering usually contain several basickinds of ingredients.There are surface active agents，or surfactants，which aresubstances that greatly lower the surface tension of water.This physical effect isimportant in detergency，and many surfactants are effective detergents by themselves.There are also builder，which，are generally inorganic salts or alkalis that enhance thecleaning action of the surfactant，although they themselves may not be good detergents.Detergents may also contain auxiliary components that impart special performancecharacteristics to the material.

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