词汇	史密斯县
释义	史密斯县 Smith County
随便看	context-free graph context free graph grammar context free grmmar contextfree language context free language context-free language context-free language recognizer context freeness context-free normal system context-free parser context free parsing context free phrase structure grammar context-free phrase structure grammar context-free phrase structure rule context-free program context-free programmed grammar context-free recognition algorithm context-free rewriting rule context free rule context-free rule context-free rules context-free speech context free text context-free text context-free tree grammar