抽象的力量在于它允许我们忽略不相关的细节，专注于问题的本质方面。
The power of abstraction is that it allows us to ignore irrelevant details and focus on the essential aspects of a problem.
There is no such thing as a small word; every word carries the universe.
自由不是任何人可以给予的东西。自由是人们夺取的，人们有多想要自由，就有多自由。