—— 请按键盘 空白键 开始游戏 ——

最重要的是保持最重要的事情最重要。
我不是说唱歌手,我是一个拼写的传奇。
We begin with the hypothesis that any subject can be taught effectively in some intellectually honest form to any child at any stage of development.
The best solutions come from collaboration between industry, government, and communities.