What does Juliet mean in the lines 35-52 ACT 2 Scene 2?

It is not very helpful to use line numbers when talking about a Shakespeare play unless the person you are talking to has exactly the same book as you do. But I'm guessing you are talking here about Juliet's speech which starts "Romeo! Oh, Romeo! Wherefore art thou Romeo? Deny thy father and refuse thy name! Or, if thou wilt not, be but sworn my love and I'll no longer be a Capulet." The speech is about the names of things as opposed to the reality of things. Juliet has been taught to hate all things named Montague, but she is finding this hard to reconcile with her attraction for Romeo. She reconciles it by saying that the name of a thing is not as real as the thing; a name can easily be changed. "That which we call a rose by any other name would smell as sweet."