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数学的快乐来自创造的行为,而不仅仅是结果。
The discovery of topological insulators has opened up a new frontier in condensed matter physics, where the interplay between topology and symmetry leads to novel quantum states of matter.
Liberty is the right to do what the law permits.
“谁如命运似的催着我向前走呢?““那是我自己,在身背后大跨步走着。”
政府下的人的自由是拥有一个普遍适用的常规生活准则,而不受另一个人的多变、不确定和武断意愿的支配。