—— 请按键盘 空白键 开始游戏 ——

事前考虑清楚,可是一旦到了该行动的时候,就要毫不犹豫,放手一搏。
人大多由基因和环境塑造,但在这些限制之内,他们有一定的自由选择自己的道路。
Mathematics is a conversation between the past and the future.
The only limit to your impact is your imagination and commitment.
Mathematics is the art of giving the same name to different things.