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The strength of the pack is the wolf, and the strength of the wolf is the pack.
量子力学和引力之间的相互作用是我们这个时代最大的谜题,解决它将揭示宇宙的秘密。
The only thing we have to fear is fear itself.
We act as though comfort and luxury were the chief requirements of life, when all that we need to make us happy is something to be enthusiastic about.