悲伤就是知识

The more you try to be happy, the more unhappy you become.

思维在于设想、实现结构特征和结构要求。

The spirit is the life that itself cuts through life; it feeds on the fire that burns within the soul.

The paper industry has a responsibility to lead the way in environmental stewardship.

实现明天的唯一限制是我们今天的疑虑。