Istill see your shadows why cant i get over you. you were my first love and my last love. all this love is lost because i cant get over you and the fact that your gone. why?

The reason you are holding on to that might be because you have hope that this person who left you might come back. If they left you they aren't worth hoping for them to come back. This is a question that probably should be asked elsewhere but hope I can help.

in the analysis of systems that involve fluid flow, we frequently encounter the combination of properties u and pv.