How to pronounce 精通 in Cantonese (7 out of 9):

所以佢哋兩個可以精通英文
So they both know English.

Cantonese Sentence Breakdown

所以 so2 ji5
hence
佢哋 keoi5 dei6
(pronoun) they
loeng5
two
both
some
a few
tael, unit of weight equal to 50 grams (modern) or 1
16 of a catty 斤jīn [斤] (old)
a group of about ten people
go3
individual
this
that
size
classifier for people or objects in general or an action
indicates approximation when placed before numbers and after a verb
adds emphasis when added before a complement used with a verb
size
height
one
possessive particle
ten thousand dollars
bucks
可以 ho2 ji5
(adjective) so so
精通 zing1 tung1
proficient
英文 jing1 man4
English