Custom is the great guide of human life.
风俗习惯是人类生活的重要指南。
He who refuses to do arithmetic is doomed to talk nonsense.
曾经尝试过,曾经失败过。没关系。再试一次。再失败一次。失败得更好。
The concept of infinity is not just a mathematical abstraction, but a physical reality.
膨胀的概念是宇宙在其最早的时刻经历了一段极其迅速的扩张期。