—— 请按键盘 空白键 开始游戏 ——

There is only one boss. The customer. And he can fire everybody in the company from the chairman on down, simply by spending his money somewhere else.
投资中最重要的事情不是你赚了多少钱,而是你在税后保留了多少。
粒子的概念只是一种近似,仅在特定极限情况下有效。