Topological insulators are a prime example of how theoretical predictions can lead to experimental discoveries that reshape our understanding of the physical world.

The Ethiopians say that their gods are snub-nosed and black, the Thracians that theirs have light blue eyes and red hair.

不只是国家有染的问题，对士而言也有受到熏染的问题。 

互联网的未来不在于技术，而在于人。

当你想要放弃的时候，想想你当初为什么坚持了这么久。