How to pronounce 拓展 in Cantonese (3 out of 4):

再加上一個拓展
And then I added an extension.

Cantonese Sentence Breakdown

再加上 zoi3 gaa1 soeng5
in addition to
一個 jat1 go3
a; one
拓展 tok3 zin2
(verb) Develop