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.
拓扑绝缘体的美在于它们的鲁棒性；它们的表面态受到对称性和拓扑的保护，使它们对某些类型的无序免疫。
When an object is lost， 95% of the time it is hiding within arm’s reach of where it was last seen. Search in all possible locations in that radius and you’ll find it.
粮食安全始于赋予粮食种植者力量。
There are some things one remembers even though they may never have happened.