This is the 5279th most frequent Russian word.
одними
The Russian word "одними" is the instrumental plural form of "один," meaning "by/with/some (only) ones" depending on context.
In this sentence, 'одними' means 'alone' or 'by means of' to indicate the sole use of efforts to achieve success.
Мы добились успеха одними усилиями.
We succeeded through efforts alone.
Here, 'одними' emphasizes the exclusive use of jokes to entertain oneself.
Он веселился одними шутками.
He had fun solely through jokes.
In this context, 'одними' highlights that just knowledge is insufficient to resolve the issue; other factors are needed.