How to pronounce 黑洞 in Cantonese (8 out of 9):

即係呢個product可以製造黑洞
This product can make a black hole.

Cantonese Sentence Breakdown

即係 zik1 hai6
(adverb) same as; exactly as; equivalent to; 'which means' or 'which is to say', usually used before explanations
呢個 ni1 go3
this
可以 ho2 ji5
(adjective) so so
製造 zai3 zou6
manufacture
黑洞 hak1 hung2
black hole