twice algorithm的用法和样例：
例句
- An algorithm of feature surface recognition based on quadric surface fitting and geometry property was presented.
摘要提出了基于二次曲面拟合误差分析和几何属性分析的特征曲面识别算法。 - Uses the quantile estimates calculated by the extended algorithm to compute intermediate quantile estimates by means of quadratic interpolation.
使用扩展算法进行分位数的估算，以二次插值法的均值计算中间分位数。
