在量子材料的领域中，拓扑的概念提供了一个强大的透镜，通过它我们可以理解和预测新的物质相。

The desire to write grows with writing.

The duty of the Government is to leave commerce to its own capital and credit as well as all other branches of business.

译文：这种无端的愁绪最让人痛苦!不要去倚靠那高高的栏杆，夕阳正缓缓沉落，烟雾笼罩的柳林让人见了肝肠寸断。