After assigning Dufan a "homework," Angel did not look at him, but turned to the others and said, "There's a little time left before the five minutes for questions are up. There is one more chance to ask. Does anyone have any doubts?"
The crowd looked at each other, and seeing Dufan's plight, no one dared to act rashly now.
However, perhaps it was Angel's dazzling proof formula demonstration that also intimidated everyone from asking more questions. Angel looked around and no one spoke up.
"It seems you are willing to give up this opportunity; very well, let's continue our analysis..." Just as Angel was about to continue, he saw someone stand up.
"Do you have a question?"
The person who stood up was Vannerson. He nodded solemnly: "Yes, I have some questions about the interaction between energy and matter."
