川大电气学院自动化专业英语5.pptVIP

Specialized English for Automation自动化专业英语 前缀符号数值中文名称例词tera-T1012兆兆（亿万）giga-G109千兆（十亿） gigahertz (GHz) 10kHz～1GHz meg(a)-M106兆 megohmmeter, megohertz (MHz)kilo-k103千 kilometer (km) kilovolt (kV) kilowatt (kW) kilogram (kg）hecto-h102百 hectogram, deca-da101十 decameterdeci-d10-1分（十分之一） decimetercenti-c10-2厘 centimeter(cm) milli-m10-3毫 milliampere（mA） milliammeter micro-μ10-6微 microfarad（μF）nano-n10-9纳 nanometer (nm)pico-p10-12微微 picocoulomb (pC), picofarad (pF)femto-f10-15毫微微atto-a10-18微微微Symbol and Formula国际单位制中的前缀 2)小数，分数，百分数Symbol and Formula0.1: zero point one, point one, one tenth, decimal one0.01: point zero one, 10.35: ten point three five1/2: a (one) half 1/3: a third1/4: one quarter 1/8: a eighth2/3: two-thirds, two over three, two divided by three3/4: three-fourths, three quarters3%: three percent0.2% : point two percent5‰: five per mill 3)幂（power）根（root）Symbol and Formula: x square,the second power of x,:y cube,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 Symbol and Formula4)数学运算符号A+BA and B, A plus B A-BA minus BA×BA times B, A multiplied by BA÷BA over B, A divided by BA±BA plus or minus BA=BA equals B, A is equal to BA≠BA is not equal to B, A is not BA≈BA is approximately equal to B ABA is greater than BABA is less than BABA is much (far) greater than BABA is much less than BA≥BA is greater than or equal to B. A≤BA is less than or equal to B. A∝BA is proportional to b, A varies directly as BA: BA to BSymbol and Formula4)数学运算符号 Symbol and Formula Symbol and Formula