拓扑绝缘体的美在于它们的鲁棒性；它们的表面态受到保护，不受无序和缺陷的影响。
The beauty of topological insulators lies in their robustness; their surface states are protected against disorder and imperfections.
The concept of law is a complex one, involving not only rules but also principles, policies, and standards.
The more difficult the victory, the greater the happiness in winning.
自私性是一种自爱，怜悯心是一种他爱。一个人想要得到他人的爱，他自己首先应具备爱人之心。