我们无权假设任何物理定律存在，或者即使它们至今存在，它们将来也会以类似的方式继续存在。
"Cada livro é uma porta para um novo mundo, uma nova experiência."
The coal industry is the backbone of America.
In my solitude of heart I feel the sigh of this widowed evening veiled with mist and rain.
The study of automorphic representations is a key to understanding the Langlands conjectures.
I don't believe in principles, in case you haven't noticed.