—— 请按键盘 空白键 开始游戏 ——

数学的本质在于它的自由。
The essence of mathematics lies in its freedom.
如果人生能像初次见面那样美好,就不会有后来的离别和悲伤。
I never guess. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.
译文:我在人群中千百次地寻找他,不经意间一回头,却发现那个人站在灯火稀疏、幽暗冷清的地方。
天然气将在向低碳未来过渡的过程中扮演关键的桥梁燃料角色。