Mathematics is not a spectator sport. You have to get involved.
数学不是一项观赏性运动。你必须参与其中。
The fight against viruses is a battle of wits between nature and human ingenuity.
这是我个人的一小步,却是全人类的一大步。
应对不自由世界的唯一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。