know of
US /noʊ ʌv/
UK /noʊ ʌv/

1.
知道, 听说过
to be aware of someone or something, often without having detailed knowledge
:
•
Do you know of any good restaurants nearby?
你知道附近有什么好餐馆吗?
•
I only know of him by reputation, I've never met him.
我只知道他的名声,从未见过他本人。