Environmental responsibility is no longer optional for our industry; it's a fundamental requirement for survival.
The use of a program to prove the 4-color theorem will not change mathematics - it merely demonstrates that the theorem, a challenge for a century, is a finite problem.
书籍是飞机，是火车，是道路。它们是目的地，也是旅程。它们是家。
对付一个不自由的世界唯一的方法就是变得如此绝对自由，以至于你的存在本身就是一种反叛。