The world is a book， and those who do not travel read only one page.
世界是一本书，不旅行的人只读了其中一页。
当下是唯一的现实，唯一的确定性。
Every problem in NP can be reduced to the satisfiability problem, which is the cornerstone of computational complexity theory.
La poesía es la única prueba concreta de la existencia del hombre.
Success is not final, failure is not fatal: It is the courage to continue that counts.
最深刻的洞见往往来自意想不到的地方。