丁肇中教授曾为南航师生作了一场学术报告。按照惯例,一小时报告后,丁教授回答同学们提问。“您觉得人类在太空能找到暗物质和反物质吗?”“不知道。”“您觉得您从事的科学实验有什么经济价值吗?”“不知道。”“您能不能谈谈物理学未来20年的发展方向?”“不知道。” Professor Ding Zhaozhong made a academic report for teachers and students of China Southern Airlines. As usual, after an hour's report, Professor Ding answered students' questions. “Do you think humans can find dark matter and antimatter in space?” “I do not know.” “What economic value do you think your science experiments are doing?” “I do not know.” “Could you talk about physics for the next 20 years? The direction of development? ”“ I do not know. ”