脫離本題 (tyut3 lei4 bun2 tai4) — to change the subject; to digress from the topic under discussion in Cantonese
tyut˗₃脫leiˎ₄離bunˊ²本taiˎ₄題简 脱离本题
Mandarin Pinyin: tuo1 li2 ben3 ti2
Meaning of 脫離本題
nounto change the subject; to digress from the topic under discussion