lecture1专业英语的特点.ppt

(2)小数，分数，百分数 1.6 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 mille (3)幂（power）根（root） x to the second power 1.6 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 1.6 Symbol and Formula (4)几何形状 三角形—— triangle 四边形—— tetragon 长方形—— rectangle 五边形—— pentagon 六边形—— hexagon 圆形—— circle 梯形—— trapezoid 菱形—— rhombus 平行四边形—— parallelogram 卵形—— oval 椭圆形—— ellipse 锥形—— pyramid 圆锥形—— cone 圆柱体—— cylinder 球形—— sphere 2.4 Symbol and Formula (5) 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 1.7 Useful Expression (1) To indicate the relationship 相关性 relative to 相对于 be related to in relation to in relation about related be in connection with something relevant与相应的某物有关联 the relevance of 与……有关 with a similar pattern to 与……相同 be in accord with the results 1.7 Useful Expression (1) To indicate the relationship 与……相反 on the contrary in contrary but quite on the contrary in sharp contrast contrary to what would be expected contrary to the expectation that contrary to previou