—— 请按键盘 空白键 开始游戏 ——

数学不知道种族或地理边界;对于数学来说,文化世界是一个国家。
The only way to be truly contemporary is to be untimely.
The most painful state of being is remembering the future, particularly the one you'll never have.
Running a business requires social responsibility. We must not only pursue economic benefits but also pay attention to food safety and environmental protection.