说明：  动态时间规整（DTW）算法一种基于动态规划的思想，，解决了说话人不同时期发音长短、语速不一样的匹配问题。
(Dynamic Time Warping (DTW) algorithm based on the idea of ​ ​ dynamic programming, to solve the different periods of the speaker pronunciation length, speed is not the same match.)