可持续性不是一种选择，而是农业未来的必然需求。

Liberty is the fruit of thought.

最重要的是你要有一个北极星，你必须知道自己要去哪里。

人は、困難を乗り越えることで、成長する。

一个人的富有程度与他能置之不理的事物的数量成正比。

数学的本质在于它的自由。

Happiness in this world, when it comes, comes incidentally. Make it the objet of pursuit, and it leads us a wild-goose chase, and is never attained. Follow some other object, and very possibly we may find that we have cought happiness without dreaming of it.