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.
痛苦是净化灵魂的火焰。
有些选择返回乡村的人，当地人十分欢迎他们回乡。因为他们在城市获得了知识，技术，和人际关系，通过互联网的帮助，他们可以创造更多工作，在发展较落后的地区将农业升级并创造更多商机。
判我有罪吧，没关系。历史将宣判我无罪。
Sustainability isn't an option; it's a responsibility we owe to future generations.
The harder you work for something, the greater you’ll feel when you achieve it.