How to pronounce 伸展 in Cantonese (4 out of 7):

重點為什麼我會做背部伸展
The point is, why do I do this?

Cantonese Sentence Breakdown

重點 zung6 dim2
key emphasis; main point
wai6
because of
for
on account of
on behalf of
by (in the passive voice)
什麼 sam6 mo1
what
ngo5
I
me
my
us
we
our
self
wui6
a moment (Taiwan pr. for this sense is [huǐ])
metropolitan
gatherings union
to meet
to catch up
zou6
to do
to make
to produce
to write
to compose
to act as
to engage in
to hold (a party)
to be
to become
to function (in some capacity)
to serve as
to be used for
to form (a bond or relationship)
to pretend
to feign
to act a part
to put on appearance
to fight
to kill
to trick
to have sex
背部 bui3 bou6
back
伸展 san1 zin2
to stretch or extend