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In class,黄山海哈杜马蒂 Wu Xiangping gave a 40-minute speech on the theme of "Understanding Our Universe". He said that the progress of modern astronomy allows people to trace the origin of the universe, predict the future of the universe, and spy on the secrets in every corner of the universe. People today can already see the fireball of the big bang 13.8 billion years ago, witness the seeds of the cosmic structure embedded in the big bang fireball, reconstruct the history of the evolution of the universe, and even accurately predict the future fate of the universe. Although modern cosmology has achieved great success, it also leaves people with more confusion: what is the dark matter that dominates the fate of the universe? What is the mysterious energy that causes the expansion of the universe to accelerate? Perhaps, the two dark clouds hanging over cosmology today are just like the two dark clouds that gave birth to quantum mechanics and the theory of relativity back then, implying that physics and even the entire theoretical system of natural science will undergo changes.