n.非终结符号
The syntax analyzer has one recursive procedure for each nonterminal U. 对于每个非终结符号U，语法分析程序都有一个递归过程。
The syntax analyzer has one recursive procedure for each nonterminal U . 对于每个非终结符号u，语法分析程序都有一个递归过程。
Every nonterminal symbol must appear on the left side of at least one rule. 每个未在声明段中定义的名字都被假设为非终结符。
A single feature is used to partition the set of training vectors at each nonterminal node of the binary tree. 使用分词独立结构代替状语从句或并列分句；
The binary tree consists of a single-root node and a set of terminal and nonterminal nodes. 介词十动名词短语代替定语从句或状语从句。
