—— 请按键盘 空白键 开始游戏 ——

As to the gods, I have no means of knowing either that they exist or that they do not exist. For many are the obstacles that impede knowledge, both the obscurity of the question and the shortness of human life.
The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.
科学必须是世界上的一股善的力量。
质量从来不是偶然的;它始终是智慧努力的结果。