In a world filled with hate, we must still dare to hope. In a world filled with anger, we must still dare to comfort. In a world filled with despair, we must still dare to dream. And in a world filled with distrust, we must still dare to believe.

做数学就是探索一个思想的宇宙，唯一的限制是你的想象力。

我们必须平衡能源发展与环境保护，实现可持续增长。

最虚度的日子，是那些没有欢笑的日子。