The future of drones belongs to those who dare to dream and take action.
悲伤不是线性的。它不会整齐地从否认走向接受。
引用自海明威《老人与海》,张海迪在演讲中多次引用以表达坚韧精神
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
模形式的算术是数论更深层次对称性的反映。