咕 咕 是 什么
gu1 gu1 shi4 shen2me
on on v:cop pro:wh
咕 咕 是 什么 ?
k u ˥ WORD_BOUNDARY k u ˥ WORD_BOUNDARY ʂ ɻ̩ ˥˩ WORD_BOUNDARY ʂ ə ˧˥ n m ɤ WORD_BOUNDARY 
咕 WORD_BOUNDARY 咕 WORD_BOUNDARY 是 WORD_BOUNDARY 什 么 WORD_BOUNDARY