—— 请按键盘 空白键 开始游戏 ——

可持续发展不是一种选择;它是能源未来的必要条件。
I think that the novel is the perfect form for exploring the complexities of human nature.
I don't believe in style. I believe in the process of thinking.
Profitability and responsibility can go hand in hand.
Topology is the study of the properties of a figure that are unchanged by any deformation.