The only thing we have to fear is fear itself.
我们唯一需要害怕的就是害怕本身。
四元数的诞生，如同几何、代数、形而上学和诗歌这四位父母的奇特后代。
Coal keeps America competitive in the world.
In the quest for understanding the fundamental nature of reality, we must be prepared to question everything we think we know.
The best way to think about a program is to think about it.