I have called this principle, by which each slight variation, if useful, is preserved, by the term Natural Selection.  

在农业中，数据很重要，但由经验锻造的直觉是不可替代的。

Success in agriculture is measured not just in yield, but in the health of the soil and the community.

The best weapon of a dictatorship is secrecy, but the best weapon of a democracy should be the weapon of openness.