历史给我们的教训是，人们从来都不知道汲取历史的教训。
History taught us is that people never know learn the lessons of history.
"La literatura es el arte de contar mentiras para decir la verdad."
解释：情绪变化会影响身体生理反应，如贪心时口水增多，悲哀时流泪，体现了情绪与健康的关联。
The concept of legal obligation is central to the understanding of law.
Sustainability isn't a choice—it's our responsibility to future generations.