次要规则是那些规定主要规则的创建、修改和废止的规则。

Sustainability isn't a choice anymore—it's a responsibility we owe to future generations.

The Book of Life begins with a man and a woman in a garden…It ends with Revelations.

The office of President is one which requires the utmost diligence and attention.

I went to the woods because I wished to live deliberately. I wanted to live deep and suck out all the marrow of life, to put to rout all that was not life.

你的态度，而不是你的能力，将决定你的高度。