To understand chemistry at its most fundamental level, we must look at the dance of electrons in molecules.

你应该问的问题不是“我想要什么？”或“我的目标是什么？”而是“什么会让我兴奋？”

"The hawk was everything I wanted to be: solitary, self-possessed, free from grief, and numb to the hurts of human life."

知识的最大敌人不是无知，而是知识的幻觉。

The coal industry is the backbone of America.