How to pronounce 拉鍊 in Cantonese (8 out of 9):

但是不是完全100% 安全因為沒有拉鍊
But it's not 100% safe because there's no tractor.

Cantonese Sentence Breakdown

但是 daan6 si6
but
不是 bat1 si6
is not
完全 jyun4 cyun4
completely; wholly
安全 on1 cyun4
safe
safety
因為 jan1 wai6
due to
沒有 mou5 jau5
without
拉鍊 laai1 lin2
Zipper