How to pronounce 口腔 in Cantonese (5 out of 6):

嚟到訓練口腔嘅肌肉
It's the muscles that train the mouth.

Cantonese Sentence Breakdown

lei4
used in transliteration
to come
used as a final particle to add emphasis
dou3
to (a place)
until (a time)
up to
to go
to arrive
(verb complement denoting completion or result of an action)
been to
a particle used after a verb or adjective to indicate degree
extent
訓練 fan3 lin6
Training
口腔 hau2 hong1
oral
koi3
indignant
generous
to sigh (with emotion)
肌肉 gei1 juk6
(adjective) muscular