数据不是信息，信息不是知识，知识不是理解，理解不是智慧。

The value of all things contracted for, is measured by the appetite of the contractors.

The labor which it would require to make a single one of these guns by hand would exhaust the patience and perseverance of any ordinary workman.

在科学中最令人兴奋的短语，预示着新发现的，不是“我找到了！”，而是“这很有趣...”

Coal is not just a commodity, it's a commitment to America's future.

真正的幸福来自于对自己和他人的爱。