农业的真正进步不仅以产量衡量成功，还要看生态系统健康。

The study of mind should be the study of its adaptive functions.

The best way to predict the future of farming is to create it.

The power of abstraction is that it allows us to reason about systems at a higher level, without getting bogged down in the details.

If you're lonely when you're alone，you're in bad pany。

The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.