畜牧业的创新不仅仅是技术问题；它关乎理解动物和农民的需求。
Innovation in animal husbandry is not just about technology; it's about understanding the needs of both animals and farmers.
Good policy requires both sound theory and empirical validation.
快乐不是一件自我存在的东西，它仅是与其他不快乐事情的一个相对比照，这就是快乐的整个情况。
模形式的算术是理解数论更深奥谜团的关键。
As data grows, so does the complexity of managing it. The challenge is to keep the systems simple and efficient.
The state is the most important institution in human history.
解释：天道远离人间，人道则存在于身边的社会人事之中，可以就近掌握。对于人所难及的事物，如何能知道呢？