而當時呢一位 27 歲嘅年輕人
And this 27-year-old man,

Cantonese Sentence Breakdown

nang4
an alternative form for 能,to be able
當時 dong1 si4
back then
ni1
this
jat1
one
single
a (article)
as soon as
entire
whole
all
throughout
"one" radical in Chinese characters (Kangxi radical 1)
also pr. [yāo] for greater clarity when spelling out numbers digit by digit
first (positional)
one part of a fraction, such as 'a' quarter, an eighth
a short duration (when used with a verb)
each
same
dedicated
from the start
wai6
position
location
place
seat
classifier for people (honorific)
classifier for binary bits (e.g. 十六位 16-bit or 2 bytes)
throne
post
rank
status
seoi3
classifier for years (of age)
year
year (of crop harvests)
age
koi3
indignant
generous
to sigh (with emotion)
年輕人 nin4 hing1 jan4
young people