wen2zou3 是 什么
wen2zou3 shi4 shen2me
chi v:cop pro:wh
wen2zou3 是 什么 ?
w ə˧˥ n ts ou̯˧˩˧ WORD_BOUNDARY ʂ ɻ̩˥˩ WORD_BOUNDARY ʂ ə˧˥ n m ɤ WORD_BOUNDARY 
w e n 2 z o u 3 WORD_BOUNDARY 是 WORD_BOUNDARY 什 么 WORD_BOUNDARY