质量不是选择;它是要求。
记忆是复杂的东西,是真相的亲戚,但不是它的双胞胎。
The most profound discoveries in mathematics often come from questioning the most basic assumptions.
数学中最深刻的发现往往来自于对最基本假设的质疑。
对我们未来最大的威胁是冷漠。
The path to sustainability is paved with both challenges and opportunities.