Agriculture is not just a business; it's a way of life.

文化唯物主义基于一个简单的前提，即人类社会生活是对地球生存实际问题的回应。

读书人虽然有书本知识，但最根本的还是在于把书本知识变为实际行动。

The past is never dead. It's not even past.

The most important challenge facing the world today is the need to create strong, effective, and accountable states in the developing world.

耐心是一种美德，我正在学习耐心。这是一个艰难的课程。