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In the realm of quantum materials, the concept of topology provides a powerful lens through which we can understand and predict new phases of matter.
阿拉曼战役不是战争的结束,甚至不是战争开始时期的结束,而可能是战争结束时期的开始。
法律的概念涉及主要规则和次要规则的结合。
The farmer is the only man in our economy who buys everything at retail, sells everything at wholesale, and pays the freight both ways.