—— 请按键盘 空白键 开始游戏 ——

学习数学的唯一方法就是做数学。
"I work very slowly. It's a process of building up layers and adjusting until it feels right."
在冬天的深处,我发现我内心有一个不可战胜的夏天。
Sustainability isn't a choice; it's the only path forward for responsible business.
A financial crisis is often a self-fulfilling prophecy driven by panic.