另一个是提出汉字夹用汉语拼音的试验范围：感叹词、拟声词、助词、音译外来词、生僻字以及口语中有音无字的词。
Secondly , the field where pinyin is better fit than characters , namely , in exclamation , sound imitation , auxiliary words , foreign words , words where are rarely used , and colloquial sounds which do not have written equivalents .
有音无字