Topology is the study of the properties of a figure that are unchanged by any deformation.
拓扑学是对图形在任何变形下保持不变的性质的研究。
The best films are the ones that make you think.
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
自信不是"他们会喜欢我",而是"他们不喜欢我也没关系"。