I saw where people wrote that the match between Barcelona and Bayern Munich is "The Road To Europa"

I need a very good explanation. Is there no chances for Barcelona to qualify?
What will be the result that will happen in both Barcelona and Bayern match and Milan vs Plzen match so that Barcelona can qualify for the stage.
Does it mean that there is no hope for Barcelona, even if Plzen miraculously wins Milan which I doubt will happen. But for assumption sake, what if Milan losses to Plzen?
Barcelona still has a chance to qualify if Inter draw in the next match, but it's like a miracle of the world because Inter probably won't draw or lose against Plzen. Previously when visiting to Doosan Arena Inter could make the home helpless with a score of 0-2, this time also Inter will look more ferocious to qualify. But there is always hope for Barcelona, because the game is not over yet there are still two more
