The beauty of topological insulators lies in their robustness; their surface states are protected by symmetry and topology, making them immune to certain types of disorder.

文章是用来阐明道理的。

The arithmetic of modular forms is a key to understanding the deeper mysteries of number theory.

Technology should serve the land, not dominate it.

数学是理性的音乐。

印度革命被无限期推迟了。

适合一个人的鞋子会夹痛另一个人的脚，不存在适合一切人的生活方式。

有生活目标的人几乎可以忍受任何方式。

"Love is not a victory march, it's a cold and it's a broken hallelujah."

The opening up of new markets, foreign or domestic, and the organizational development from the craft shop and factory to such concerns as U.S. Steel illustrate the same process of industrial mutation—if I may use that biological term—that incessantly revolutionizes the economic structure from within, incessantly destroying the old one, incessantly creating a new one.