The study of computational complexity is not just about classifying problems; it is about understanding the nature of computation itself.

A poet can service everything but a misprint.

解释：骄纵、奢侈、荒淫、放荡，这是走上邪路的开始。

我们能种植的最宝贵作物是农民与消费者之间的信任。

可持续性不是一种趋势；而是我们对后代的责任。