—— 请按键盘 空白键 开始游戏 ——

When you do something best in life, you don’t really want to give that up – and for me it’s tennis.
In mathematics, the journey is just as important as the destination; the process of discovery is where the real learning happens.
传统方法蕴含智慧,但可持续发展要求我们在必要时超越它们。