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弦理論的數(shù)學(xué)美感表明它必須是自然界終極描述的一部分。

I don't run from my past, I just don't bring it with me.

I don't let the world change my spirit.

The strength of a building is not just in its materials, but in the spirit of the people who use it.

要真正理解宇宙，我們必須首先理解我們理解的極限。