—— 请按键盘 空白键 开始游戏 ——

The search for reciprocity laws is a fundamental theme in the history of mathematics.
质量从来不是偶然的;它始终是智慧努力的结果。
In the realm of psychology, the power of suggestion can alter perceptions and even memories, highlighting the malleability of the human mind.
The best picture books are those that respect the child’s intelligence and imagination.