I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.
中国农业要走出一条有自己特色的现代化道路。
There is a time for daring,and there is a time for caution, and a wise man understanding which is called for
预测未来的最好方式就是创造未来
不探索奇景,不穷尽幽深之处,就不足以谈论山水
The most important thing in science is not so much to obtain new facts as to discover new ways of thinking about them.