成功不是终点，失败也不是致命的，重要的是继续前进的勇气。
Success is not final, failure is not fatal: It is the courage to continue that counts.
Every challenge is an opportunity in disguise—if you're willing to see it.
A mathematician's best work often comes from seeing connections where others see none.
在观察性研究中，我们常常不得不依赖于无法直接检验的假设。