A proof is a device for convincing someone else that a mathematical statement is true.
证明是一种用于使他人相信数学陈述为真的工具。
"The 21st century is oppressed by a crushing sense of finitude and exhaustion."
阅读是打开世界的钥匙。
The only purpose for which power can be rightfully exercised over any member of a civilized community， against his will， is to prevent harm to others.
创新不仅仅是技术问题，更是改变思维方式和拥抱新思路的过程。