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物理学的美丽在于它能够用最深刻的理论解释最简单的现象。
The biggest problem with the European Union is that it is not a state, but it pretends to be one.
"In the study of algorithms, we often find that the most efficient solutions are also the most elegant."
在量子场论中,真空并非空无一物,而是充满了虚粒子。