—— 请按键盘 空白键 开始游戏 ——

The beauty of instrumental variables is that they allow us to see the world in a new light.
我不是一个完美的人,但我正在努力成为最好的自己。
In computer science, we often deal with problems that are easy to state but hard to solve.
只有掌握核心技术,才能立于不败之地。
The greatest weakness of all is the great fear of appearing weak.