科技英语简介.pptVIP

2.3 Vocabulary Features 混合法:由两个词汇的第一个词汇的前面几个字母和第二个词汇的后面几个字母结合在一起构成。 positron negatron 字母外形法 :对一些形状与字母外形相似的物体，可以利用连字符把字母和名词连接在一起组成新词汇。 X-ray X 射线 U-shaped magnet 马蹄形磁铁 Y-direction Y轴方向 H-frame structure H型框架结构 T-filter T型滤波器 Y-connection Y(星)形连接 —positive electron正电子 — negative electron负电子 2.3 Vocabulary Features 人名法:对一些科学家、发明家所发现或发明的理论、方法、定理或定律、东西和物品等，用他们的名字组成新词。 Ohm—欧姆 Volt—伏特 Watt—瓦特 Ampere—安培 Hertz—赫兹 Kelvin—开尔文 Coulomb-库仑 2)小数，分数，百分数 2.4 Symbol and Formula 0.1: zero point one, point one, o point one, one tenth, decimal one 0.01: point zero one, 10.35: ten point three five 1/2: a (one) half 1/3: a third 1/4: one quarter 1/8: a eighth 2/3: two-thirds, two over three, two divided by three 3/4: three-fourths, three quarters 3%: three percent 0.2% : point two percent 5‰: five per mill 3)幂（power）根（root） x to the second power 2.4 Symbol and Formula : x square, x squared , the square of x, the second power of x, y to the third power :y cube, y cubed, the cube of y, the third power of y, :the nth power of a , a to the n power : the square root o f three : the cube (third ) root of a :the nth root of a 2.4 Symbol and Formula 4)数学运算符号 A+B A and B, A plus B A-B A minus B A×B A times B, A multiplied by B A÷B A over B, A divided by B A±B A plus or minus B A=B A equals B, a equals to b , a is equal to b A≠B A is not equal to B, A is not B A≈B A is approximately equal to B AB A is greater than B AB A is less than B AB A is greater than B AB A is less than B AB A is much (far) greater than B AB A is much less than B A≥B A is greater than or equal to B. A≤B A is less than or equal to B. A∝B A is proportion to b, a varies directly as b A: B A to B 2.4 Symbol and Formula 2.4 Symbol and Formula Specialized English for Materials Science and Engineering 材料科学与工程专业英语 Lecture 1 Introduction 引言 1.1 什么是专业英语 普通英语（Common English, Ordinary English） 科技英语（English for Science and Technology） 专业英语 （English for Special Science and Technology） 是结合各自专业的科技英语