—— 请按键盘 空白键 开始游戏 ——

真相是,过去是我们所拥有的一切。我们无法改变它,但我们可以从中学习。
道德毫无神圣之处;它纯粹只是人之常情。
In mathematics, the journey is just as important as the destination.
Learning to read involves the development of attentional networks that allow children to focus on letters and words while ignoring distractions.