The history of a nation is, in essence, the history of its ruling class.
人的欲望和其他激情，本质上是受到他自己控制的；他真正的困难在于，要知道何时需要加以控制，何时不需要。
释义：上顺应于天，下取悦于民。使民众喜悦，人民便忘记了劳苦；用喜悦战胜困难，民众就会忘掉死亡的威胁，喜悦的作用太大了，它能勉励民众！
石油和天然气的未来在于平衡传统专业知识和尖端技术。
The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.
创新不仅仅是技术，更是改变我们的思维方式。
"A good picture book should work without any words at all."