情感不需要复杂的解释——有时一笔画就能传达一切。

The first prerequisite of a sound foreign policy is a clear understanding of one's own values.

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.

生活是世界上最罕见的事情。大多数人只是存在，仅此而已。