说明：  　牛顿插值法利用函数f (x)在某区间中若干点的函数值，作出适当的特定函数，在这些点上取已知值，在区间的其他点上用这特定函数的值作为函数f (x)的近似值。
(Newton interpolation method using the function f (x) function value in a range, make the appropriate specific function, take the known values ​ ​ at these points, and other points on the interval with the value of this particular function as a function f ( x) approximation.)