—— 请按键盘 空白键 开始游戏 ——

Always be grateful for what you have.
Sustainability is no longer an option; it's a necessity for the future of leather tanning.
The study of L-functions is a testament to the power of abstraction in mathematics.
If history were taught in the form of stories, it would never be forgotten.
在我看来,语言是我们取之不尽的魔法源泉。