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

讓你保持電腦涼快
Keep your computer cool.

Cantonese Sentence Breakdown

joeng6
to yield
to permit
to let sb do sth
to have sb do sth
to make sb (feel sad etc)
to allow
to concede
to convey
to transfer
to make way
to step aside
by
nei5
you (informal, as opposed to courteous 您nín [您])
can be used to refer to an unspecified person
保持 bou2 ci4
maintain
電腦 din6 nou5
computer
涼快 loeng4 faai3
cool and refreshing