说话有分寸则少得罪人；行为有节制则少悔恨；爱慕有节制则要求少；快乐有节制则祸败少；饮食有节制则疾病少。
The beauty of topological insulators lies in their robustness; their surface states are protected against disorder and imperfections.
Silence can be the loudest element in a piece.