The most important political development of the last half century has been the spread of liberal democracy around the world.

解读：健康是人生基石，一旦失去健康，再多财富、名誉都无福消受，警示人们莫因一时贪念，损害身体，权衡利弊时，把健康放首位。

Incomplete perfection is more profound than complete perfection.

几个世纪以来纸张一直是人类知识的载体，我们的责任是确保它再延续几个世纪。#