https://www.youtube.com/watch?v=S-5LFiuieCE
微积分术语的英文念法
函数 f of x
极限 the limit as x approaches 0 of
单侧极限 the limit as x approaches 0 from the left/right of
the limit as x approaches 0 from the more negative/positive side of
立方根 the cube root of
指数 e to x
在某处求值 evaluated at x=0
对数 log base a of x
分式 numerator over denominator
高阶微分 nth derivative of y with respect to x
二阶微分(d/dx形式) d squared y over dx squared
导数的撇号形式 f (double/triple) prime of x
定积分 the integral from (lower limit) to (upper limit) of
不定积分 the integral of x dx
下标（x1） x sub 1
求和 the sum from i equals 1 to n
