—— 请按键盘 空白键 开始游戏 ——

Concerning the gods, I have no means of knowing whether they exist or not or of what sort they may be, because of the obscurity of the subject, and the brevity of human life.
关于神,我无法知道他们是否存在或他们是什么样的,因为这个问题太晦涩,而人的生命又太短暂。
我们从这样的假设开始:任何学科都可以以某种智力上诚实的形式有效地教给处于任何发展阶段的任何孩子。
A cake is only as good as the ingredients you put into it.
Play is the language of childhood, and books should speak that language too.