到底 是 什么 呢
dao4di3 shi4 shen2me ne
adv v:cop pro:wh sfp
到底 是 什么 呢 .
t au̯˥˩ t i˧˩˧ WORD_BOUNDARY ʂ ɻ̩˥˩ WORD_BOUNDARY ʂ ə˧˥ n m ɤ WORD_BOUNDARY n ɤ WORD_BOUNDARY 
到 底 WORD_BOUNDARY 是 WORD_BOUNDARY 什 么 WORD_BOUNDARY 呢 WORD_BOUNDARY