解释：不在农忙时役使百姓而耽误农时，那么可以保证百姓富裕。

我不是因为快乐而唱歌；我因为唱歌而快乐。

The beauty of computational theory lies in its ability to abstract the complexities of the world into manageable and understandable models.

The hepatitis C virus was a hidden enemy, but every hidden enemy can be found with the right tools and determination.

Innovation without practicality is just noise—farmers need real solutions.