Sometimes the basic unit is the phrase, but some other times the basic unit is the phoneme or if one's studying language as a system of writing it might be the syllable.
有时候基本单位是一个词组，有时候则是一个音素，也就是在写作的研究中的，一个音节。
2
The base unit in mandarin speech recognition is phoneme, semi syllable or syllable.
汉语语音识别的基本单元一般为音素、音节以及声韵母。
3
Thispaper argues that every phoneme in a word must be syllabified according to the received syllable template.