每个数学问题都有解决方案，但并非每个解决方案都显而易见。
Every mathematical problem has a solution, but not every solution is immediately apparent.
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。
The rules of survival never change, whether you’re in a desert or in an office.
人心比山川更险恶，比了解天象更困难。