How to pronounce 卜卜聲 in Cantonese (1 out of 2):

當聽到卜卜聲就可以食飯
You can eat when you hear the sound of the bubble.

Cantonese Sentence Breakdown

當 dong3
right
trap
trick
pawn
to regard as
to pawn
thought
fit
proper
safe
appropriate
to treat as
聽到 ting1 dou2
hear
卜卜聲 buk1 buk1 seng1
(onomatopoeia) heartbeat
就可以 zau6 ho2 ji5
then can
食飯 sik6 faan6
to have a meal