现代林业必须平衡三个轴心:生态、经济和道德。
数学的研究就像空气或重力——它无处不在,你看不到它,但你知道它在那里。
就是说做不善的事情要受到惩罚,做善事会得到奖赏。 
I don’t think anything is unrealistic if you believe you can do it.
The interplay between randomness and structure is a central theme in both mathematics and computer science.