The joy of mathematics is in the struggle to understand.
"Every word is a step towards freedom."
Combinatorics is like the art of counting without actually counting.
暗示某些历史真相或古墓之谜不应被揭开。
拓扑绝缘体的发现开启了凝聚态物理学的新前沿,其中对称性和拓扑的相互作用导致了新的量子物质状态。