1、formula and symbol pronunciation,1/10 one-tenth 1/100 one per cent1/1000 one-thousandth1/10000 one ten-thousandth21/2 two and one half； 42/3 four and two-thirds 0.46% point four six per cent,含小数点的数字，小数点“.”读“point”，小数点后的数若是两位以上，则分别读出。0.5读作：point five0.25读作：point two five0.125读作；point one two five93.6
2、4m读作：ninety-three point six four meters215.11读作：two minutes fifteen point one one seconds,分数中分子用基数词表示，分母用序数词表示。先读分子，后读分母。当分子大于1时，分母要加“s”。1/2读作：one half1/3读作：one third1/4读作：one fourth2/3读作：two thirds1/5/9读作：one over five ninths 比较复杂的分数常常用over这个词表示。如： 317/509读作：three hundred and seventeen over five hu
3、ndred and nine,Because of,There for,degree,perpendicular to,dot,infinite,Varies as,Nabla,Round / partial,x+1 x plus onex-1 x minus onex1 x plus or minus onexy xy ( x times y)x/y x over y ( x divided by y) x = 5 x equals to 5x5 x is not equal to 5 x y x is approximately equal to y x y x is identical
4、with y,x y x is greater than yxy x is greater than or equal to yx y x is less than yxy x is less than or equal to y0 x 1zero is less than x is less than 10x1zero is less than or equal to x is less than or equal to 1| x | mod x x x approaches infinity,xA x belongs to A xA x does not belong to A AB A
5、is contained in B AB A contains B AB A intersection BAB A union B,x2 x squared x3 x cubed x4 x to the fourth power xn x to the nth power xnx to the power of minus n root x cube root x fourth root x nth root x,square meter,cubic meter,( x+y ) 2 x plus y all squared( x/y ) 2 x over y all squared n! n
6、factorial x hat x bar x tilde X i xi 或 x sub i the sum from i equals one to n a i,f( x ) fx / the function f of xf( x ) f prime x f( x ) f double-prime x f( x ) f triple-prime x f (n) ( x ) f nth -prime x,f prime, sub c a first, prime a second, second prime first derivative of z second derivative of
7、 z first derivative of z with respect to x y is a function of x,f / x1 partial derivative of f with respect to x12f /2x1 second partial derivative of f with respect to x1lim x0 the limit as x approaches zerolim x 0 +the limit as x approaches zero from abovelim x 0 -the limit as x approaches zero fro
8、m belowlog e y log y to the base e ln(y) natural log y,nth derivative of f with respect to x an indefinite integral of the function fx integral of the function fx from a to b e to the x power log of x to the base a commom logarithm of x,Scalar product of a and b Vector product of a and bRe(z) Real p
9、art of ZIm(z) Imaginary part of z,E is equal to the ratio of p divided by a to e divided by l，is equal to the ratio of the product p l to the product a e. the fifth root of a square,the integral of d y over by the square root out of c square minus y square d over by dx of the integral from x sub 0 to x of capital大写的 X d sub x,i h bar round over round t is equal to minius h bar square nabla square over two plus U times ,Practice makes perfect,
