The beauty of topological insulators lies in their robustness; their surface states are protected by symmetry and topology, making them immune to certain types of disorder.
如果我的世界明天消逝,我会回顾所有我有幸拥有的快乐,兴奋和精彩。不是悲伤,失败或者我父亲的离家而去,而是所有事物愉快的一面,这样就足够了。