[计] 树型修饰文法 grammar tree: 语法树图tree grammar: 树文法; 树形文法; 树语法; 树状文法expansive stochastic tree grammar: 扩展随机树状文法expansive tree grammar: 扩展树状态文法; 扩展树状文法regular tree grammar: 正则树文法下载手机词典可随时随地查词查翻译