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

在 V-Ray5 當中不論是 GPU CUDA 還是 GPU RTX 測試光線追蹤效能
In V-Ray 5, the GPU CUDA or GPU RTX tests the light tracking performance.

Cantonese Sentence Breakdown

zoi6
(located) at
(to be) in
to exist
in the middle of doing sth
(indicating an action in progress)
to depend on
to rest with
to be alive
當中 dong1 zung1
among
不論 bat1 leon6
no matter what
si6
is
還是 waan4 si6
or
測試 caak6 si3
test
光線 gwong1 sin3
rays of light
追蹤 zui1 zung1
follow
效能 haau6 nang4
(noun) Function