Omawiając in inglese:

The topic is worth discussing.

They're discussing their next project.

How is that question germane to what we're discussing?

It has nothing to do with the subject we are discussing.

Confine your remarks to the matter we are discussing.

Discussing the matter further will get you nowhere.

We would often sit up all night discussing politics.

Tom pressed his ear against the wall to see if he could hear what his parents were discussing in the next room.

Tom tried not to listen to Mary and John discussing their financial situation.

PTAs in various places are discussing school regulations.

We have been discussing minor matters; it's high time we began talking turkey.

By reading books and discussing concepts, a person can gain wisdom and tolerance of differing ideas.

That idea we were discussing in class yesterday really piqued my interest.

While we were discussing the situation, Terri broke in to give her opinion.

I can't calculate the final cost without first discussing it with our contractors.