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

除咗沖走表面嘅雜質之外
And besides washing away the surface of the debris,

Cantonese Sentence Breakdown

除咗 ceoi4 zo2
aside from; except for; unless
沖走 cung1 zau2
wash away
表面 biu2 min6
surface
koi3
indignant
generous
to sigh (with emotion)
雜質 zaap6 zat1
impurities
之外 zi1 ngoi6
besides