Coal miners are the unsung heroes of America's industrial strength.
这不是一个非常芬芳的世界，但这是你生活的世界。
The only true voyage of discovery would be not to visit strange lands but to possess other eyes, to behold the universe through the eyes of another, of a hundred others.
If you have an apple and I have an apple, and we exchange apples, we both still only have one apple. But if you have an idea and I have an idea, and we exchange ideas, we each now have two ideas.
