This is the 83rd most frequent Ukrainian word.
яких
"Яких" means "which" or "of which" in English, used as a relative pronoun.
The word 'яких' acts as a relative pronoun referring to 'речі' with which the action of talking is associated.
Це ті речі, про яких ми говорили вчора.
These are the things we talked about yesterday.
The word 'яких' relates to 'друзі' indicating companions serving as a role model.
У них є друзі, з яких можна брати приклад.
They have friends who can be set as an example.
The word 'яких' links to 'результати' to denote possession concerning their origin in relation to the research being discussed.