—— 请按键盘 空白键 开始游戏 ——

Every problem in mathematics is a puzzle waiting to be solved, and the joy is in the solving.
数学中的每个问题都是一个等待解决的谜题,而乐趣就在于解决的过程。
对于任何事务,要改变它就要先接受它。谴责不会解放而只会压迫。
All writing is autobiography.
Every book is a journey, and every journey is a book.
商业中最有价值的货币不是金钱,而是信任。