How to pronounce 白老鼠 in Cantonese (1 out of 8):

便是白老鼠
And it was a white mouse.

Cantonese Sentence Breakdown

便是 bin6 si6
is
白老鼠 baak6 lou5 syu2
a guinea pig, a person or thing used as a subject for experiment [written and colloquial]