grammar_sample.abnf 158 Bytes Edit Raw Blame History Permalink 1 2 3 4 5 6 7 8 #ABNF 1.0 UTF-8; language zh-CN; mode voice; root $main; $main = $place1 到 $place2; $place1 = 北京|武汉|南京|天津|东京; $place2 = 上海|合肥;