While eating their lunch, Sabrina seems a little sad and barely touching her food.
"Would you like to eat something else, Sabrina? I could buy outside if you want another food." Alex offered to buy Sabrina a different meal.
"No, it is fine. The food is not the problem." Sabrina replied and started eating her lunch.
"If it is not the food, then what is bothering you? You seemed energetic this morning. Are you feeling sick?" Alex was worried about Sabrina's health.
"No. Don't worry about me. I just feel a little sad." Sabrina sighed.
"Why? You could tell it to me. I am more than willing to listen and help you." Alex replied.
"Well. I just feel disappointed that after all the hours we spent experimenting in the laboratory room, it seems like we have no progress yet. It feels like we hav
