How to pronounce 鑽研 in Cantonese (3 out of 5):

喺佢不斷鑽研底下
And he was constantly researching.

Cantonese Sentence Breakdown

hai2
in
heoi5
he
she
it (Cantonese)
Mandarin equivalent: 他tā [他]
不斷 bat1 dyun6
continuously
鑽研 zyun3 jin4
delve into
底下 dai2 haa5
underneath