应对不自由世界的唯一方式，就是让自己彻底自由，以至于你的存在本身就是一种反抗。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
Collaboration in mathematics is essential; the exchange of ideas leads to breakthroughs that no single mind could achieve alone.
When you attack coal, you attack middle America.