诗人能挺过一切劫难，除了印刷错误。
A poet can survive everything but a misprint.
可持续性不是一种趋势，而是唯一的前进道路。
Responsible forestry is not a choice, it's an obligation for all of us.《Forests of Tomorrow》
真正的喜悦精神、崇高感、超越人类的感觉，这是最高卓越的试金石，在数学中肯定能找到，就像在诗歌中一样。
My work is purely autobiographical... It is about myself and my surroundings.
美国农业面临的最大危险是家庭农场的消失。