ordinary derivative of a set function

例句：

1. 1. Theordinary derivative of the function f(x) = x^2 is 2x.
   函数f(x) = x^2的普通导数是2x。
2. 2. In mathematics, the ordinary derivative of a function is often used to describe how the function changes with respect to its arguments.
   在数学中，一个函数的普通导数通常用来描述函数如何随着其自变量的变化而变化。
3. 3. The ordinary derivative can be used to find the slope of a line in a graph, which is useful for calculating areas andvolumes.
   普通导数可以用来找到图形中直线的斜率，这对于计算面积和体积非常有用。