帮助地球最有效的方法就是停止食用动物。
The most effective way to help the planet is to stop eating animals.
没有规则，就没有真正的艺术。
今天的美好时光，就是明天的悲伤回忆。
It's not worth doing something unless someone, somewhere, would much rather you weren't doing it.
The discovery of topological insulators has opened up a new frontier in condensed matter physics, where the interplay of symmetry and topology leads to novel quantum states of matter.