We say of some things that they can't be forgiven, or that we will never forgive ourselves. But we do—we do it all the time.

人真正需要的不是无压力的状态，而是为值得的目标奋斗和努力。

现在天下没有人行义，那么你应该鼓励我，为什么反而阻止我呢？ 

The discovery of topological insulators has opened up a new frontier in condensed matter physics, where the interplay between topology and symmetry leads to novel quantum states of matter.

如果一个社会中的大部分成员贫穷而悲惨，那么这个社会就谈不上繁荣幸福。