Mathematics is the most beautiful and most powerful creation of the human spirit.
And when your stomach is empty and your mind is full,it's always hard to sleep.
年轻人是可怕的,因为怎么能知道他的将来不如我们现在呢?但如果一个人到了四十、五十岁还默默无闻,他也就没有什么可怕的了。
The future of forestry lies in balancing economic needs with ecological responsibility.
"In every ending, there is a beginning waiting to be discovered."