—— 请按键盘 空白键 开始游戏 ——

有时我们为某些事感到悲伤,却不愿告诉别人。我们想保守这个秘密。或者有时我们感到悲伤,却真的不知道为什么悲伤,于是我们说我们不悲伤,但实际上我们是悲伤的。
The best way to learn a new programming language is by writing programs in it.
Mathematics advances not by the efforts of individuals alone but through the collective work of generations.
儿童是通过努力从事活动,从而使个人得到发展的。
The internet is the future, and the future is now.