By comparing ancient and modern Chinese, we think the word conversion in modern Chinese is mainly a rhetoric phenomenon but in ancient Chinese is a lexical-syntactic phenomenon.
现代汉语的活用主要是修辞现象，而古汉语的活用却主要是“词汇—语法”现象。
2
Having introduced the compile technology into the process of NC code analysis, the process of NC code compile is divided into three stages: Lexical analysis, Syntactic analysis and NC code Conversion.