I don't regret anything I've ever done in my life, any choice that I've made. But I'm consumed with regret for the things I didn't do.

对煤炭的战争就是对美国工人的战争。

To understand the universe, you must understand the language in which it is written, and that language is mathematics.

Think wrongly, if you please, but in all cases, think for yourself.

个人的传记是由其所嵌入的历史和社会背景塑造的。

中心地是总旅行距离最小的点。