The best way to learn mathematics is to do mathematics.
学习数学的最好方法就是去做数学。
推理小说的魅力不仅在于解谜,还在于对人性的深刻剖析。
The beauty of topological insulators lies in their robustness; their surface states are protected against disorder and imperfections.
The value and utility of any experiment are determined by the fitness of the material to the purpose for which it is used.