The beauty of topological insulators lies in their robustness; their surface states are protected against disorder and imperfections.
过去是一个陌生的国度;那里的人们做事方式不同。
乳制品行业必须随着消费者需求而发展,否则我们就有被淘汰的风险。
我越努力工作,就越活得精彩。