他不满他所拥有的，也不会满足他想要的。
可持续农业需要在技术和生态保护之间取得平衡。
人生苦短，不能不追随梦想。
The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.