The coal industry has been the backbone of America's energy independence for generations.

我不是追随者，我是领导者。

Every book is a door to another world.

艺术之美在于真理之光穿过想象力的棱镜。

对自然界的理解及其内涵不仅是巨大好奇心的来源，也是巨大成就感的来源。