说明：  介绍了在执行G代码的运动控制中,对G代码 数控程序的解析、处理,并设计了一种针对高速高精度运动控制的Lookahead 功能的算法
(Introduced in the implementation of motion control in the G code, G code NC programs on the analysis, processing, and designed a high-precision motion control for high speed algorithms Lookahead function)